Bug#873199: gdm3 fails to open X sessions on the console and on X servers using xdmcp (Stretch 9.1)

Fri Aug 25 13:07:07 UTC 2017

Package: gdm3
Version: 3.22.3-3
Severity: grave
Justification: renders package unusable

Dear Maintainer,

A few months ago I met no difficulties to configure our debian Wheezy 
server to manage X sessions with gdm3, on the console and an a set of X 
servers (Windows PC with Cygwin/X) using xdmcp.
I was unable to retrieve this functionality after a dist-upgrade to 
Jessie (cf. https://lists.debian.org/debian-user/2016/10/msg00437.html).
I hoped that Stretch could permit me to retrieve it. The dist-upgrade 
from Jessie to Stretch was perfect but let unsolved our problems with gdm3.
May be does it work on a fresh install ? On my upgraded server it 
doesn't and I fail to progress.
I don't know whether the problems are due to wrong file permissions 
somewhere, wrong values for some parameters, or to problems on which I 
can't get a grip on, or even to the gdm3 package.
They probably are not the same for the console and the xdmcp requests.
Thank you to have a look at these lines that I have tried to select for you.

1. For the console

The server reboots without any error and finishes with a last message 
telling that GNOME Display Manager has started but nothing else is 
displayed (no greeter, no prompt).
I have to type Alt-Ctrl-F3 (or F4, F5, F6) to get a login prompt on tty3 
(or tty4, tty5, tty6) and open a terminal on the console.
I can also connect with ssh -X from other Linux workstations.

Just after this reboot, I get the status of gdm3 and cgmanager services:

systemctl -l status gdm3
● gdm.service - GNOME Display Manager
    Loaded: loaded (/lib/systemd/system/gdm.service; static; vendor 
preset: enabled)
    Active: active (running) since Tue 2017-08-22 18:38:48 CEST; 8min ago
   Process: 3849 ExecStartPre=/usr/share/gdm/generate-config 
(code=exited, status=0/SUCCESS)
   Process: 3844 ExecStartPre=/bin/sh -c [ "$(cat 
/etc/X11/default-display-manager 2>/dev/null)" = "/usr/sbin/gdm3" ] 
(code=exited, status=0/SUCCESS)
  Main PID: 3858 (gdm3)
     Tasks: 3 (limit: 12288)
    CGroup: /system.slice/gdm.service
            └─3858 /usr/sbin/gdm3

systemctl -l status cgmanager
● cgmanager.service - Cgroup management daemon
    Loaded: loaded (/lib/systemd/system/cgmanager.service; disabled; 
vendor preset: enabled)
    Active: inactive (dead)

Curiously it seems that there has been no attempt to launch X on the 
server (Xorg.0.log not modified during the reboot), despite a loop to 
try to create and display the gdm greeter on the console (from 
/var/log/debug).
Last update of /var/log/Xorg.0.log corresponds with a launch of startx 
on a session opened on the console (tty3) with cgmanager and gdm3 
services running.
I see no error in Xorg.0.log, but nothing was displayed and tty3 seemed 
frozen after this attempt.

What I get with systemd-cgls just after the reboot (cgmanager is 
lacking: loaded but dead)
Control group /:
-.slice
├─init.scope
│ └─1 /sbin/init
└─system.slice
   ├─irqbalance.service
   │ └─3343 /usr/sbin/irqbalance --foreground
   ├─lvm2-lvmetad.service
   │ └─2333 /sbin/lvmetad -f
   ├─gdm.service
   │ └─3858 /usr/sbin/gdm3
   ├─nfs-idmapd.service
   │ └─3262 /usr/sbin/rpc.idmapd
   ├─nfs-mountd.service
   │ └─3450 /usr/sbin/rpc.mountd --manage-gids
   ├─console-kit-daemon.service
   │ └─4279 /usr/sbin/console-kit-daemon --no-daemon
   ├─colord.service
   │ └─3499 /usr/lib/colord/colord
   ├─systemd-timesyncd.service
   │ └─3323 /lib/systemd/systemd-timesyncd
   ├─nmbd.service
   │ └─3777 /usr/sbin/nmbd
   ├─NetworkManager.service
   │ └─3335 /usr/sbin/NetworkManager --no-daemon
   ├─dbus.service
   │ └─3330 /usr/bin/dbus-daemon --system --address=systemd: --nofork 
--nopidf...
   ├─accounts-daemon.service
   │ └─3347 /usr/lib/accountsservice/accounts-daemon
   ├─system-postgresql.slice
   │ ├─postgresql at 9.4-prod.service
   │ │ ├─3551 /usr/lib/postgresql/9.4/bin/postgres -D /db/pg/9.4/prod -c 
confi...
   │ │ ├─3617 postgres: logger process
   │ │ ├─3641 postgres: checkpointer process
   │ │ ├─3642 postgres: writer process
   │ │ ├─3643 postgres: wal writer process
   │ │ ├─3644 postgres: autovacuum launcher process
   │ │ └─3645 postgres: stats collector process
   │ ├─postgresql at 9.4-main.service
   │ │ ├─3552 /usr/lib/postgresql/9.4/bin/postgres -D /db/pg/9.4/main -c 
confi...
   │ │ ├─3616 postgres: logger process
   │ │ ├─3636 postgres: checkpointer process
   │ │ ├─3637 postgres: writer process
   │ │ ├─3638 postgres: wal writer process
   │ │ ├─3639 postgres: autovacuum launcher process
   │ │ └─3640 postgres: stats collector process
   │ ├─postgresql at 9.1-prod.service
   │ │ ├─3548 /usr/lib/postgresql/9.1/bin/postgres -D /db/pg/9.1/prod -c 
unix_...
   │ │ ├─3668 postgres: logger process
   │ │ ├─3671 postgres: writer process
   │ │ ├─3672 postgres: wal writer process
   │ │ ├─3673 postgres: autovacuum launcher process
   │ │ └─3674 postgres: stats collector process
   │ ├─postgresql at 9.1-main.service
   │ │ ├─3547 /usr/lib/postgresql/9.1/bin/postgres -D /db/pg/9.1/main -c 
confi...
   │ │ ├─3666 postgres: logger process
   │ │ ├─3682 postgres: writer process
   │ │ ├─3683 postgres: wal writer process
   │ │ ├─3684 postgres: autovacuum launcher process
   │ │ └─3685 postgres: stats collector process
   │ └─postgresql at 9.6-main.service
   │   ├─3498 /usr/lib/postgresql/9.6/bin/postgres -D 
/var/lib/postgresql/9.6/...
   │   ├─3558 postgres: 9.6/main: checkpointer process
   │   ├─3559 postgres: 9.6/main: writer process
   │   ├─3560 postgres: 9.6/main: wal writer process
   │   ├─3561 postgres: 9.6/main: autovacuum launcher process
   │   └─3562 postgres: 9.6/main: stats collector process
   ├─winbind.service
   │ ├─3793 /usr/sbin/winbindd
   │ ├─3800 /usr/sbin/winbindd
   │ ├─4154 /usr/sbin/winbindd
   │ └─4155 /usr/sbin/winbindd
   ├─smbd.service
   │ ├─3860 /usr/sbin/smbd
   │ ├─3867 /usr/sbin/smbd
   │ ├─3868 /usr/sbin/smbd
   │ └─4156 /usr/sbin/smbd
   ├─sfcb.service
   │ ├─4161 /usr/sbin/sfcbd -d
   │ ├─4162 /usr/sbin/sfcbd -d
   │ ├─4167 /usr/sbin/sfcbd -d
   │ ├─4168 /usr/sbin/sfcbd -d
   │ ├─4516 /usr/sbin/sfcbd -d
   │ └─4525 /usr/sbin/sfcbd -d
   ├─ssh.service
   │ ├─ 3438 /usr/sbin/sshd -D
   │ ├─22166 sshd: root at pts/0
   │ ├─22178 -bash
   │ └─22219 systemd-cgls
   ├─avahi-daemon.service
   │ ├─4262 avahi-daemon: running [my_strech_server.local]
   │ └─4263 avahi-daemon: chroot helper
   ├─smartd.service
   │ └─3333 /usr/sbin/smartd -n
   ├─rpcbind.service
   │ └─3324 /sbin/rpcbind -f -w
   ├─nfs-blkmap.service
   │ └─2361 /usr/sbin/blkmapd
   ├─dataeng.service
   │ ├─3650 /opt/dell/srvadmin//sbin/dsm_sa_datamgrd
   │ ├─4718 /opt/dell/srvadmin//sbin/dsm_sa_eventmgrd
   │ ├─4772 /opt/dell/srvadmin//sbin/dsm_sa_snmpd
   │ └─4876 /opt/dell/srvadmin//sbin/dsm_sa_datamgrd
   ├─ModemManager.service
   │ └─3346 /usr/sbin/ModemManager
   ├─systemd-logind.service
   │ └─3350 /lib/systemd/systemd-logind
   ├─rtkit-daemon.service
   │ └─3352 /usr/lib/rtkit/rtkit-daemon
   ├─dsm_om_connsvc.service
   │ ├─5446 /opt/dell/srvadmin/sbin/dsm_om_connsvcd -run
   │ └─5447 /opt/dell/srvadmin/sbin/dsm_om_connsvcd -run
   ├─cups.service
   │ └─3353 /usr/sbin/cupsd -l
   ├─minissdpd.service
   │ └─3754 /usr/sbin/minissdpd -i 0.0.0.0
   ├─polkit.service
   │ └─3385 /usr/lib/policykit-1/polkitd --no-debug
   ├─cron.service
   │ └─3351 /usr/sbin/cron -f
   ├─apache2.service
   │ ├─4254 /usr/sbin/apache2 -k start
   │ ├─4255 /usr/sbin/apache2 -k start
   │ ├─4459 /usr/sbin/apache2 -k start
   │ ├─4460 /usr/sbin/apache2 -k start
   │ └─4461 /usr/sbin/apache2 -k start
   ├─systemd-udevd.service
   │ └─2380 /lib/systemd/systemd-udevd
   ├─acpid.service
   │ └─3359 /usr/sbin/acpid
   ├─rpc-statd.service
   │ └─3779 /sbin/rpc.statd --no-notify
   ├─rsyslog.service
   │ └─3348 /usr/sbin/rsyslogd -n
   ├─tomcat7.service
   │ └─4119 /usr/lib/jvm/default-java/bin/java 
-Djava.util.logging.config.file...
   ├─atd.service
   │ └─3337 /usr/sbin/atd -f
   ├─systemd-journald.service
   │ └─2292 /lib/systemd/systemd-journald
   ├─cups-browsed.service
   │ └─3354 /usr/sbin/cups-browsed
   └─exim4.service
     └─4175 /usr/sbin/exim4 -bd -q30m

Content of /var/log/messages

Aug 22 18:38:36 my_strech_server kernel: [    0.000000] Linux version 
4.9.0-3-amd64 (debian-kernel at lists.debian.org) (gcc version 6.3.0 
20170516 (Debian 6.3.0-18) ) #1 SMP Debian 4.9.30-2+deb9u3 (2017-08-06)
Aug 22 18:38:36 my_strech_server kernel: [    0.000000] Command line: 
BOOT_IMAGE=/vmlinuz-4.9.0-3-amd64 
root=UUID=0d05b519-16e4-4bb9-9834-d80a7f6d5436 ro quiet
...
--> first error:
Aug 22 18:38:50 my_stretch_server udev-acl.ck[4355]: g_slice_set_config: 
assertion 'sys_page_size == 0' failed
Aug 22 18:38:50 my_stretch_server udev-acl.ck[4433]: g_slice_set_config: 
assertion 'sys_page_size == 0' failed
Aug 22 18:38:50 my_stretch_server gdm-session-worker[3909]: Failed 
opening dbus connection: org.freedesktop.DBus.Error.FileNotFound: Failed 
to connect to socket /sys/fs/cgroup/cgmanager/sock: Aucun fichier ou 
dossier de ce type (No such file or directory with this type)

--> I see that /sys/fs/cgroup/cgmanager doesn't exist. I cannot create 
it (read-only file system)

Aug 22 18:38:51 my_stretch_server 
/usr/lib/gdm3/gdm-wayland-session[4434]: Activating service 
name='org.freedesktop.systemd1'
Aug 22 18:38:51 my_stretch_server systemd-shim[4519]: Could not connect 
to cgmanager: Could not connect: No such file or directory
Aug 22 18:38:51 my_stretch_server systemd-shim[4519]: Unable to acquire 
bus name 'org.freedesktop.systemd1'.  Quitting.
Aug 22 18:38:51 my_strech_server 
/usr/lib/gdm3/gdm-wayland-session[4434]: Activated service 
'org.freedesktop.systemd1' failed: Process org.freedesktop.systemd1 
exited with status 1
Aug 22 18:38:51 my_strech_server 
/usr/lib/gdm3/gdm-wayland-session[4434]: Unable to register display with 
display manager
Aug 22 18:38:51 my_strech_server gdm-session-worker[3909]: Failed 
opening dbus connection: org.freedesktop.DBus.Error.FileNotFound: Failed 
to connect to socket /sys/fs/cgroup/cgmanager/sock: Aucun fichier ou 
dossier de ce type
Aug 22 18:38:51 my_strech_server gdm3: Child process -4434 was already dead.
Aug 22 18:38:51 my_strech_server udev-acl.ck[4624]: g_slice_set_config: 
assertion 'sys_page_size == 0' failed
Aug 22 18:38:51 my_strech_server gdm3: Child process 3909 was already dead.
Aug 22 18:38:51 my_strech_server gdm3: Unable to kill session worker process
Aug 22 18:38:51 my_strech_server [4635]: g_slice_set_config: assertion 
'sys_page_size == 0' failed
Aug 22 18:38:51 my_strech_server gdm-session-worker[4623]: Failed 
opening dbus connection: org.freedesktop.DBus.Error.FileNotFound: Failed 
to connect to socket /sys/fs/cgroup/cgmanager/sock: Aucun fichier ou 
dossier de ce type
Aug 22 18:38:51 my_strech_server 
/usr/lib/gdm3/gdm-wayland-session[4636]: Activating service 
name='org.freedesktop.systemd1'
Aug 22 18:38:51 my_strech_server systemd-shim[4641]: Could not connect 
to cgmanager: Could not connect: No such file or directory

--> Then a loop with the same sequence of errors until the final relief 
(too many opened files):

Aug 22 18:40:58 my_stretch_server 
/usr/lib/gdm3/gdm-wayland-session[22118]: Unable to register display 
with display manager
Aug 22 18:40:58 my_stretch_server gdm-session-worker[22107]: Failed 
opening dbus connection: org.freedesktop.DBus.Error.FileNotFound: Failed 
to connect to socket /sys/fs/cgroup/cgmanager/sock: Aucun fichier ou 
dossier de ce type (No such file or directory with this type)
Aug 22 18:40:58 my_stretch_server gdm3: Could not start command 
'/usr/lib/gdm3/gdm-session-worker': Trop de fichiers ouverts (too many 
opened files)
Aug 22 18:40:58 my_stretch_server gdm3: Child process -22118 was already 
dead.
Aug 22 18:40:58 my_stretch_server gdm3: Child process 22107 was already 
dead.
Aug 22 18:40:58 my_stretch_server gdm3: Unable to kill session worker 
process
Aug 22 18:40:58 my_stretch_server udev-acl.ck[22141]: 
g_slice_set_config: assertion 'sys_page_size == 0' failed

Content of /var/log/debug:

Aug 22 18:38:48 my_strech_server gdm3: Enabling debugging
Aug 22 18:38:48 my_strech_server gdm3: Changing user:group to 
Debian-gdm:Debian-gdm
Aug 22 18:38:48 my_strech_server gdm3: Successfully connected to D-Bus
Aug 22 18:38:48 my_strech_server gdm3: GdmManager: GDM starting to 
manage displays
Aug 22 18:38:48 my_strech_server gdm3: GdmLocalDisplayFactory: Adding 
display on seat seat0
Aug 22 18:38:48 my_strech_server gdm3: GdmDisplay: id: (null)
Aug 22 18:38:48 my_strech_server gdm3: GdmDisplay: seat id: (null)
Aug 22 18:38:48 my_strech_server gdm3: GdmDisplay: session class: greeter
Aug 22 18:38:48 my_strech_server gdm3: GdmDisplay: initial: no
Aug 22 18:38:48 my_strech_server gdm3: GdmDisplay: allow timed login: yes
Aug 22 18:38:48 my_strech_server gdm3: GdmDisplay: local: yes
Aug 22 18:38:48 my_strech_server gdm3: GdmDisplay: session type: wayland
Aug 22 18:38:48 my_strech_server gdm3: GdmDisplay: seat id: seat0
Aug 22 18:38:48 my_strech_server gdm3: GdmDisplay: initial: yes
Aug 22 18:38:48 my_strech_server gdm3: GdmDisplayStore: Adding display 
/org/gnome/DisplayManager/Displays/94457410884384 to store
Aug 22 18:38:48 my_strech_server gdm3: GdmDisplay: Managing display: 
/org/gnome/DisplayManager/Displays/94457410884384
Aug 22 18:38:48 my_strech_server gdm3: GdmDisplay: Preparing display: 
/org/gnome/DisplayManager/Displays/94457410884384
Aug 22 18:38:48 my_strech_server gdm3: doing initial setup? no
Aug 22 18:38:48 my_strech_server gdm3: GdmDisplay: prepare display
Aug 22 18:38:48 my_strech_server gdm3: GdmDisplay: Got automatic login 
details for display: 0
Aug 22 18:38:48 my_strech_server gdm3: GdmSession: Creating D-Bus server 
for worker for session
Aug 22 18:38:48 my_strech_server gdm3: GdmSession: D-Bus server for 
workers listening on unix:abstract=/tmp/dbus-4Mk0bNLU
Aug 22 18:38:48 my_strech_server gdm3: GdmSession: Creating D-Bus server 
for greeters and such
Aug 22 18:38:48 my_strech_server gdm3: GdmSession: D-Bus server for 
greeters listening on unix:abstract=/tmp/dbus-0akj8611
Aug 22 18:38:48 my_strech_server gdm3: GdmSession: Setting display 
device: (null)
Aug 22 18:38:48 my_strech_server gdm3: GdmDisplay: Running greeter
Aug 22 18:38:48 my_strech_server gdm3: GdmDisplay: Creating greeter for 
(null) (null)
Aug 22 18:38:48 my_strech_server gdm3: GdmLaunchEnvironment: Starting...
Aug 22 18:38:48 my_strech_server gdm3: GdmLaunchEnvironment: Setting up 
run time dir /var/run/gdm3/greeter
Aug 22 18:38:48 my_strech_server gdm3: GdmSession: Creating D-Bus server 
for worker for session
Aug 22 18:38:48 my_strech_server gdm3: GdmSession: D-Bus server for 
workers listening on unix:abstract=/tmp/dbus-iKmiTHbX
Aug 22 18:38:48 my_strech_server gdm3: GdmSession: Creating D-Bus server 
for greeters and such
Aug 22 18:38:48 my_strech_server gdm3: GdmSession: D-Bus server for 
greeters listening on unix:abstract=/tmp/dbus-Udx1l8hB
Aug 22 18:38:48 my_strech_server gdm3: GdmSession: Setting display 
device: (null)
Aug 22 18:38:48 my_strech_server gdm3: GdmSession: starting conversation 
gdm-launch-environment
Aug 22 18:38:48 my_strech_server gdm3: GdmSessionWorkerJob: Starting 
worker...
Aug 22 18:38:48 my_strech_server gdm3: GdmSessionWorkerJob: Running 
session_worker_job process: gdm-session-worker 
[pam/gdm-launch-environment] /usr/lib/gdm3/gdm-session-worker
Aug 22 18:38:48 my_strech_server gdm3: GdmSessionWorkerJob: : 
SessionWorkerJob on pid 3909
Aug 22 18:38:48 my_strech_server gdm3: GdmSession: setting session to 
type 'wayland'
Aug 22 18:38:48 my_strech_server gdm3: GdmLocalDisplayFactory: display 
status changed: 1
Aug 22 18:38:48 my_strech_server gdm3: GdmManager: Accepting XDMCP 
connections...
Aug 22 18:38:48 my_strech_server gdm3: GdmXdmcpDisplayFactory: Start up 
on host my_strech_server.avignon.inra.fr, port 177
Aug 22 18:38:48 my_strech_server gdm3: GdmXdmcpDisplayFactory: addrinfo 
family=inet6 type=datagram proto=UDP flags=passive
Aug 22 18:38:48 my_strech_server gdm3: GdmXdmcpDisplayFactory: 
Attempting to bind to host :: port 177
Aug 22 18:38:48 my_strech_server gdm3: GdmXdmcpDisplayFactory: Starting 
to listen on XDMCP port
Aug 22 18:38:48 my_strech_server gdm-launch-environment]: Enabling debugging
Aug 22 18:38:48 my_strech_server gdm-launch-environment]: 
GdmSessionWorker: connecting to address: unix:abstract=/tmp/dbus-iKmiTHbX
Aug 22 18:38:48 my_strech_server gdm3: GdmDBusServer: new connection 
0x55e8946c1650
Aug 22 18:38:48 my_strech_server gdm3: GdmSession: Handling new 
connection from worker
Aug 22 18:38:48 my_strech_server gdm3: GdmSession: Authenticating new 
connection
Aug 22 18:38:48 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: calling 'ListCachedUsers'
Aug 22 18:38:48 my_strech_server gdm-launch-environment]: 
AccountsService: Failed to identify the current session: Aucun 
périphérique ou adresse
Aug 22 18:38:48 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: seat unloaded, so trying to set loaded 
property
Aug 22 18:38:48 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: Listing cached users, so not setting 
loaded property
Aug 22 18:38:48 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: Listing cached users, so not setting 
loaded property
Aug 22 18:38:48 my_strech_server gdm3: GdmSession: worker connection is 
0x55e8946c1650
Aug 22 18:38:48 my_strech_server gdm3: GdmSession: Emitting 
conversation-started signal
Aug 22 18:38:48 my_strech_server gdm3: GdmSession: Beginning setup for 
session for program using PAM service gdm-launch-environment
Aug 22 18:38:48 my_strech_server gdm3: GdmSession: Conversation started
Aug 22 18:38:48 my_strech_server gdm-launch-environment]: 
GdmSessionWorker: attempting to change state to SETUP_COMPLETE
Aug 22 18:38:48 my_strech_server gdm-launch-environment]: 
GdmSessionWorker: initializing PAM; service=gdm-launch-environment 
username=Debian-gdm seat=seat0
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
GdmSessionWorker: Set PAM environment variable: 'XDG_SEAT=seat0'
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
GdmSessionWorker: Set PAM environment variable: 'XDG_SESSION_CLASS=greeter'
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
GdmSessionWorker: state SETUP_COMPLETE
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: ListCachedUsers finished, will set 
loaded property after list is fully loaded
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: tracking new user with object path 
/org/freedesktop/Accounts/User5446
...
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: tracking new user with object path 
/org/freedesktop/Accounts/User5449
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: unrefing manager owned by finished 
ListCachedUsers call
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: user first_user is now loaded
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: user first_user was not yet known, 
adding it
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: tracking user 'first_user'
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: not yet loaded, so not emitting 
user-added signal
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: not all users loaded yet
...
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: not all users loaded yet
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: user last_user is now loaded
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: user last_user was not yet known, adding it
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: tracking user 'last_user'
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: not yet loaded, so not emitting 
user-added signal
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: no pending users, trying to set loaded 
property
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: Seat wouldn't load, so giving up on it 
and setting loaded property
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: sending user-changed signal for user 
last_user
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: sent user-changed signal for user last_user
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: updating user last_user
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
GdmSessionWorker: attempting to change state to AUTHENTICATED
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
GdmSessionWorker: authenticating user Debian-gdm
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
GdmSessionWorker: state AUTHENTICATED
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
GdmSessionWorker: attempting to change state to AUTHORIZED
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
GdmSessionWorker: determining if authenticated user (password 
required:0) is authorized to session
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
GdmSessionWorker: state AUTHORIZED
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
GdmSessionWorker: attempting to change state to ACCREDITED
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
GdmSessionWorker: Set PAM environment variable: 'LOGNAME=Debian-gdm'
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
GdmSessionWorker: Set PAM environment variable: 'USER=Debian-gdm'
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
GdmSessionWorker: Set PAM environment variable: 'USERNAME=Debian-gdm'
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
GdmSessionWorker: Set PAM environment variable: 'HOME=/var/lib/gdm3'
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
GdmSessionWorker: Set PAM environment variable: 'SHELL=/bin/false'
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
GdmSessionWorker: Set PAM environment variable: 
'PATH=/usr/local/bin:/usr/bin:/bin:/usr/games'
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
GdmSessionWorker: state ACCREDITED
Aug 22 18:38:49 my_strech_server gdm3: GdmSession: type wayland, 
program? yes, seat seat0
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
GdmSessionWorker: session display mode set to new-vt
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
GdmSessionWorker: Set PAM environment variable: 'XDG_SESSION_TYPE=wayland'
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
GdmSessionWorker: attempting to change state to ACCOUNT_DETAILS_SAVED
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
GdmSessionWorker: user Debian-gdm, not fully loaded yet, will save 
account details later
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: trying to track new user with username 
Debian-gdm
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: finding user 'Debian-gdm' state 1
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: finding user 'Debian-gdm' state 2
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: Looking for user 'Debian-gdm' in 
accounts service
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: new user in accounts service with 
object path /org/freedesktop/Accounts/User114
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: tracking new user with object path 
/org/freedesktop/Accounts/User114
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: Found object path of user 'Debian-gdm': 
/org/freedesktop/Accounts/User114
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: finding user 'Debian-gdm' state 3
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: user 'Debian-gdm' fetched
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: finished handling request for user 
'Debian-gdm'
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: unrefing manager owned by fetch user 
request
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: user Debian-gdm is now loaded
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: user Debian-gdm was not yet known, 
adding it
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: tracking user 'Debian-gdm'
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: loaded, so emitting user-added signal
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: no pending users, trying to set loaded 
property
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: already loaded, so not setting loaded 
property
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: sending user-changed signal for user 
Debian-gdm
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: sent user-changed signal for user 
Debian-gdm
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: updating user Debian-gdm
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: user Debian-gdm is now loaded
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: sessions changed (user Debian-gdm) num=0
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: no pending users, trying to set loaded 
property
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: ActUserManager: already loaded, so not setting loaded 
property
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
GdmSessionSettings: saved session is
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
GdmSessionSettings: saved language is
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
GdmSessionWorker: saving account details for user Debian-gdm
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: Error calling GetAll() when retrieving properties for 
/org/freedesktop/Accounts/User114: L'opération a été annulée (operation 
canceled)
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
AccountsService: Error calling GetAll() when retrieving properties for 
/org/freedesktop/Accounts/User114: L'opération a été annulée (operation 
canceled)
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
GdmSessionWorker: attempting to change state to SESSION_OPENED
Aug 22 18:38:49 my_strech_server gdm-launch-environment]: 
GdmSessionWorker: Set PAM environment variable: 'XDG_VTNR=1'
Aug 22 18:38:50 my_strech_server udev-acl.ck[4355]: g_slice_set_config: 
assertion 'sys_page_size == 0' failed
Aug 22 18:38:50 my_strech_server udev-acl.ck[4433]: g_slice_set_config: 
assertion 'sys_page_size == 0' failed
Aug 22 18:38:50 my_strech_server gdm-session-worker[3909]: Failed 
opening dbus connection: org.freedesktop.DBus.Error.FileNotFound: Failed 
to connect to socket /sys/fs/cgroup/cgmanager/sock: Aucun fichier ou 
dossier de ce type
Aug 22 18:38:50 my_strech_server gdm3: GdmSession: Emitting 
'session-opened' signal
Aug 22 18:38:50 my_strech_server gdm3: GdmDisplay: Greeter session opened
Aug 22 18:38:50 my_strech_server gdm3: GdmDisplay: session id:
Aug 22 18:38:50 my_strech_server gdm3: GdmSession: Stopping all 
conversations except for gdm-launch-environment
Aug 22 18:38:50 my_strech_server gdm3: GdmSession: type wayland, 
program? yes, seat seat0
Aug 22 18:38:50 my_strech_server gdm3: GdmSession: type wayland, 
program? yes, seat seat0
Aug 22 18:38:50 my_strech_server gdm3: GdmSession: Emitting 
'session-started' signal with pid '4434'
Aug 22 18:38:50 my_strech_server gdm3: GdmDisplay: Greeter started
Aug 22 18:38:50 my_strech_server gdm-wayland-session: Enabling debugging
Aug 22 18:38:50 my_strech_server gdm-wayland-session: Running session 
message bus
Aug 22 18:38:51 my_strech_server 
/usr/lib/gdm3/gdm-wayland-session[4434]: Activating service 
name='org.freedesktop.systemd1'
Aug 22 18:38:51 my_strech_server systemd-shim[4519]: Could not connect 
to cgmanager: Could not connect: No such file or directory
Aug 22 18:38:51 my_strech_server systemd-shim[4519]: Unable to acquire 
bus name 'org.freedesktop.systemd1'.  Quitting.
Aug 22 18:38:51 my_strech_server 
/usr/lib/gdm3/gdm-wayland-session[4434]: Activated service 
'org.freedesktop.systemd1' failed: Process org.freedesktop.systemd1 
exited with status 1
Aug 22 18:38:51 my_strech_server gdm-wayland-session: could not fetch 
environment: GDBus.Error:org.freedesktop.DBus.Error.Spawn.ChildExited: 
Process org.freedesktop.systemd1 exited with status 1
Aug 22 18:38:51 my_strech_server gdm-wayland-session: Running wayland 
session
Aug 22 18:38:51 my_strech_server gdm3: GdmManager: trying to register 
new display
Aug 22 18:38:51 my_strech_server gdm3: GdmManager: Error while 
retrieving session id for sender: Error getting session id from systemd: 
Aucun périphérique ou adresse
Aug 22 18:38:51 my_strech_server gdm-wayland-session: Could not register 
display: GDBus.Error:org.freedesktop.DBus.Error.AccessDenied: Aucun 
affichage disponible
Aug 22 18:38:51 my_strech_server 
/usr/lib/gdm3/gdm-wayland-session[4434]: Unable to register display with 
display manager
Aug 22 18:38:51 my_strech_server gdm-session-worker[3909]: Failed 
opening dbus connection: org.freedesktop.DBus.Error.FileNotFound: Failed 
to connect to socket /sys/fs/cgroup/cgmanager/sock: Aucun fichier ou 
dossier de ce type
Aug 22 18:38:51 my_strech_server gdm3: GdmSession: Emitting 
'session-exited' signal with exit code '70'
Aug 22 18:38:51 my_strech_server gdm3: GdmSession: stopping conversation 
gdm-launch-environment
Aug 22 18:38:51 my_strech_server gdm3: GdmSessionWorkerJob: Stopping job 
pid:3909
Aug 22 18:38:51 my_strech_server gdm3: GdmCommon: sending signal 15 to 
process 3909
Aug 22 18:38:51 my_strech_server gdm3: GdmDisplay: Greeter exited: 70
Aug 22 18:38:51 my_strech_server gdm3: GdmLocalDisplayFactory: display 
status changed: 3
Aug 22 18:38:51 my_strech_server gdm3: GdmDisplayStore: Unreffing 
display: 0x55e8946c1320
... and so on ...
Aug 22 18:38:51 my_strech_server gdm3: GdmLocalDisplayFactory: Adding 
display on seat seat0
Aug 22 18:38:51 my_strech_server gdm3: GdmDisplay: id: (null)
Aug 22 18:38:51 my_strech_server gdm3: GdmDisplay: seat id: (null)
Aug 22 18:38:51 my_strech_server gdm3: GdmDisplay: session class: greeter
Aug 22 18:38:51 my_strech_server gdm3: GdmDisplay: initial: no
Aug 22 18:38:51 my_strech_server gdm3: GdmDisplay: allow timed login: yes
Aug 22 18:38:51 my_strech_server gdm3: GdmDisplay: local: yes
... till the last attempt:
Aug 22 18:40:58 my_strech_server gdm3: GdmDisplayStore: Unreffing 
display: 0x55e8946c1820
Aug 22 18:40:58 my_strech_server gdm3: GdmLocalDisplayFactory: Adding 
display on seat seat0
Aug 22 18:40:58 my_strech_server gdm3: GdmDisplay: id: (null)
Aug 22 18:40:58 my_strech_server gdm3: GdmDisplay: seat id: (null)
Aug 22 18:40:58 my_strech_server gdm3: GdmDisplay: session class: greeter
Aug 22 18:40:58 my_strech_server gdm3: GdmDisplay: initial: no
Aug 22 18:40:58 my_strech_server gdm3: GdmDisplay: allow timed login: yes
Aug 22 18:40:58 my_strech_server gdm3: GdmDisplay: local: yes
Aug 22 18:40:58 my_strech_server gdm3: GdmDisplay: session type: wayland
Aug 22 18:40:58 my_strech_server gdm3: GdmDisplay: seat id: seat0
Aug 22 18:40:58 my_strech_server gdm3: GdmDisplay: initial: yes
Aug 22 18:40:58 my_strech_server gdm3: GdmDisplayStore: Adding display 
/org/gnome/DisplayManager/Displays/94457410884896 to store
Aug 22 18:40:58 my_strech_server gdm3: GdmDisplay: Managing display: 
/org/gnome/DisplayManager/Displays/94457410884896
Aug 22 18:40:58 my_strech_server gdm3: GdmDisplay: Preparing display: 
/org/gnome/DisplayManager/Displays/94457410884896
Aug 22 18:40:58 my_strech_server gdm3: doing initial setup? no
Aug 22 18:40:58 my_strech_server gdm3: GdmDisplay: prepare display
Aug 22 18:40:58 my_strech_server gdm3: GdmDisplay: Got automatic login 
details for display: 0
Aug 22 18:40:58 my_strech_server gdm3: GdmSession: Creating D-Bus server 
for worker for session
Aug 22 18:40:58 my_strech_server gdm3: GdmSession: D-Bus server for 
workers listening on unix:abstract=/tmp/dbus-HJ93E8fP
Aug 22 18:40:58 my_strech_server gdm3: GdmSession: Creating D-Bus server 
for greeters and such
Aug 22 18:40:58 my_strech_server gdm3: GdmSession: D-Bus server for 
greeters listening on unix:abstract=/tmp/dbus-GV1nnfy4
Aug 22 18:40:58 my_strech_server gdm3: GdmSession: Setting display 
device: (null)
Aug 22 18:40:58 my_strech_server gdm3: GdmDisplay: Running greeter
Aug 22 18:40:58 my_strech_server gdm3: GdmDisplay: Creating greeter for 
(null) (null)
Aug 22 18:40:58 my_strech_server gdm3: GdmLaunchEnvironment: Starting...
Aug 22 18:40:58 my_strech_server gdm3: GdmLaunchEnvironment: Setting up 
run time dir /var/run/gdm3/greeter
Aug 22 18:40:58 my_strech_server gdm3: GdmSession: Creating D-Bus server 
for worker for session
Aug 22 18:40:58 my_strech_server gdm3: GdmSession: D-Bus server for 
workers listening on unix:abstract=/tmp/dbus-60C6CEFc
Aug 22 18:40:58 my_strech_server gdm3: GdmSession: Creating D-Bus server 
for greeters and such
Aug 22 18:40:58 my_strech_server gdm3: GdmSession: D-Bus server for 
greeters listening on unix:abstract=/tmp/dbus-9afXPcl0
Aug 22 18:40:58 my_strech_server gdm3: GdmSession: Setting display 
device: (null)
Aug 22 18:40:58 my_strech_server gdm3: GdmSession: starting conversation 
gdm-launch-environment
Aug 22 18:40:58 my_strech_server gdm3: GdmSessionWorkerJob: Starting 
worker...
Aug 22 18:40:58 my_strech_server gdm3: GdmSessionWorkerJob: Running 
session_worker_job process: gdm-session-worker 
[pam/gdm-launch-environment] /usr/lib/gdm3/gdm-session-worker
Aug 22 18:40:58 my_strech_server gdm3: GdmSession: setting session to 
type 'wayland'
Aug 22 18:40:58 my_strech_server gdm3: GdmLocalDisplayFactory: display 
status changed: 1
Aug 22 18:40:58 my_strech_server gdm3: GdmDisplay: Disposing display
Aug 22 18:40:58 my_strech_server gdm3: GdmCommon: sending signal 15 to 
process -22118
Aug 22 18:40:58 my_strech_server gdm3: GdmSession: Closing session
Aug 22 18:40:58 my_strech_server gdm3: GdmSession: Stopping all 
conversations
Aug 22 18:40:58 my_strech_server gdm3: GdmSessionWorkerJob: Stopping job 
pid:22107
Aug 22 18:40:58 my_strech_server gdm3: GdmCommon: sending signal 15 to 
process 22107
Aug 22 18:40:58 my_strech_server gdm3: GdmSessionWorkerJob: Waiting on 
process 22107
Aug 22 18:40:58 my_strech_server gdm3: GdmCommon: process (pid:22107) 
done (reaped earlier:1)
Aug 22 18:40:58 my_strech_server gdm3: GdmSessionWorkerJob: 
SessionWorkerJob died
Aug 22 18:40:58 my_strech_server gdm3: GdmSession: Disposing session
Aug 22 18:40:58 my_strech_server gdm3: GdmSession: Closing session
Aug 22 18:40:58 my_strech_server gdm3: GdmSession: Stopping all 
conversations
Aug 22 18:40:58 my_strech_server gdm3: GdmLocalDisplayFactory: Display 
0x55e8946c1820 disposed
Aug 22 18:40:58 my_strech_server gdm3: GdmDisplay: Finalizing display: 
/org/gnome/DisplayManager/Displays/94457410885664
Aug 22 18:40:58 my_strech_server gdm3: GdmDisplay: finish display

What I get with systemctl -alb

...
août 22 18:38:36 my_strech_server.avignon.inra.fr dbus[3330]: [system] 
Activating via systemd: service name='org.freedesktop.PolicyKit1' 
unit='polkit.service'
août 22 18:38:36 my_strech_server.avignon.inra.fr systemd[1]: Starting 
Authorization Manager...
...
août 22 18:38:36 my_strech_server.avignon.inra.fr systemd[1]: Started 
Login Service.
août 22 18:38:36 my_strech_server.avignon.inra.fr systemd-logind[3350]: 
New seat seat0.
août 22 18:38:36 my_strech_server.avignon.inra.fr systemd-logind[3350]: 
Watching system buttons on /dev/input/event0 (Power Button)
...
août 22 18:38:36 my_strech_server.avignon.inra.fr systemd[1]: Starting 
LSB: Systems Management Device Drivers...
...
août 22 18:38:36 my_strech_server.avignon.inra.fr polkitd[3385]: started 
daemon version 0.105 using authority implementation `local' version `0.105'
août 22 18:38:36 my_strech_server.avignon.inra.fr dbus[3330]: [system] 
Successfully activated service 'org.freedesktop.PolicyKit1'
août 22 18:38:36 my_strech_server.avignon.inra.fr systemd[1]: Started 
Authorization Manager.
...
août 22 18:38:36 my_strech_server.avignon.inra.fr NetworkManager[3335]: 
<info>  [1503419916.9683] NetworkManager (version 1.6.2) is starting...
août 22 18:38:36 my_strech_server.avignon.inra.fr NetworkManager[3335]: 
<info>  [1503419916.9684] Read config: 
/etc/NetworkManager/NetworkManager.conf
...
août 22 18:38:37 my_strech_server.avignon.inra.fr systemd[1]: Started 
Network Manager.
août 22 18:38:37 my_strech_server.avignon.inra.fr systemd[1]: Starting 
Network Manager Wait Online...
août 22 18:38:37 my_strech_server.avignon.inra.fr systemd[1]: Reached 
target Network.
août 22 18:38:37 my_strech_server.avignon.inra.fr systemd[1]: Started 
Unattended Upgrades Shutdown.
...
août 22 18:38:37 my_strech_server.avignon.inra.fr systemd[1]: Starting 
NFS Mount Daemon...
août 22 18:38:37 my_strech_server.avignon.inra.fr dbus[3330]: [system] 
Activating via systemd: service name='org.freedesktop.nm_dispatcher' 
unit='dbus-org.freedesktop.nm-dispatcher.service'
...
août 22 18:38:37 my_strech_server.avignon.inra.fr systemd[1]: Starting 
OpenBSD Secure Shell server...
...
août 22 18:38:37 my_strech_server.avignon.inra.fr systemd[1]: Starting 
Network Manager Script Dispatcher Service...
...
août 22 18:38:37 my_strech_server.avignon.inra.fr rpc.mountd[3450]: 
Version 1.3.3 starting
août 22 18:38:37 my_strech_server.avignon.inra.fr systemd[1]: Started 
NFS Mount Daemon.
août 22 18:38:37 my_strech_server.avignon.inra.fr systemd[1]: Starting 
NFS server and services...
...
août 22 18:38:37 my_strech_server.avignon.inra.fr dbus[3330]: [system] 
Successfully activated service 'org.freedesktop.nm_dispatcher'
août 22 18:38:37 my_strech_server.avignon.inra.fr systemd[1]: Started 
Network Manager Script Dispatcher Service.
...
août 22 18:38:37 my_strech_server.avignon.inra.fr dbus[3330]: [system] 
Activating via systemd: service name='org.freedesktop.hostname1' 
unit='dbus-org.freedesktop.hostname1.service'
août 22 18:38:37 my_strech_server.avignon.inra.fr systemd[1]: Starting 
Hostname Service...
...
août 22 18:38:37 my_strech_server.avignon.inra.fr systemd[1]: Started 
NFS server and services.
août 22 18:38:37 my_strech_server.avignon.inra.fr systemd[1]: Reached 
target Remote File Systems (Pre).
...
août 22 18:38:37 my_strech_server.avignon.inra.fr dbus[3330]: [system] 
Successfully activated service 'org.freedesktop.hostname1'
août 22 18:38:37 my_strech_server.avignon.inra.fr systemd[1]: Started 
Hostname Service.
août 22 18:38:37 my_strech_server.avignon.inra.fr NetworkManager[3335]: 
<info>  [1503419917.9218] settings: hostname: using hostnamed
août 22 18:38:37 my_strech_server.avignon.inra.fr NetworkManager[3335]: 
<info>  [1503419917.9218] settings: hostname changed from (none) to 
"my_strech_server.avignon.inra.fr"
...
août 22 18:38:38 my_strech_server.avignon.inra.fr dbus[3330]: [system] 
Activating via systemd: service name='org.freedesktop.ColorManager' 
unit='colord.service'
...
août 22 18:38:38 my_strech_server.avignon.inra.fr systemd[1]: Starting 
Manage, Install and Generate Color Profiles...
août 22 18:38:38 my_strech_server.avignon.inra.fr instsvcdrv[3416]: 
Starting Systems Management Device Drivers:
...
août 22 18:38:38 my_strech_server.avignon.inra.fr dbus[3330]: [system] 
Successfully activated service 'org.freedesktop.ColorManager'
août 22 18:38:38 my_strech_server.avignon.inra.fr systemd[1]: Started 
Manage, Install and Generate Color Profiles.
...
août 22 18:38:39 my_strech_server.avignon.inra.fr systemd[1]: Started 
LSB: Systems Management Device Drivers.
...
août 22 18:38:39 my_strech_server.avignon.inra.fr dataeng[3355]: 
Starting Systems Management Data Engine:
...
août 22 18:38:46 my_strech_server.avignon.inra.fr systemd[1]: Started 
Network Manager Wait Online.
août 22 18:38:46 my_strech_server.avignon.inra.fr systemd[1]: Reached 
target Network is Online.
...
août 22 18:38:46 my_strech_server.avignon.inra.fr systemd[1]: Starting 
Samba NMB Daemon...
...
août 22 18:38:47 my_strech_server.avignon.inra.fr systemd[1]: Started 
Daily apt download activities.
août 22 18:38:47 my_strech_server.avignon.inra.fr systemd[1]: 
apt-daily-upgrade.timer: Adding 26min 57.656580s random time.
août 22 18:38:47 my_strech_server.avignon.inra.fr systemd[1]: Started 
Daily apt upgrade and clean activities.
août 22 18:38:47 my_strech_server.avignon.inra.fr systemd[1]: Reached 
target Timers.
...
août 22 18:38:47 my_strech_server.avignon.inra.fr systemd[1]: Started 
/etc/rc.local Compatibility.
août 22 18:38:47 my_strech_server.avignon.inra.fr systemd[1]: Reached 
target Host and Network Name Lookups.
...
août 22 18:38:47 my_strech_server.avignon.inra.fr systemd[1]: Started 
Samba NMB Daemon.
août 22 18:38:47 my_strech_server.avignon.inra.fr systemd[1]: Starting 
Samba Winbind Daemon...
...
août 22 18:38:47 my_strech_server.avignon.inra.fr systemd[1]: Started 
Samba Winbind Daemon.
août 22 18:38:47 my_strech_server.avignon.inra.fr systemd[1]: Starting 
Samba SMB Daemon...
...
août 22 18:38:47 my_strech_server.avignon.inra.fr systemd[1]: Reached 
target Remote File Systems.
août 22 18:38:47 my_strech_server.avignon.inra.fr systemd[1]: Starting 
LSB: The X Display Manager...
août 22 18:38:47 my_strech_server.avignon.inra.fr systemd[1]: Starting 
LSB: Start the GNUstep distributed object mapper...
août 22 18:38:47 my_strech_server.avignon.inra.fr systemd[1]: Starting 
LSB: Start or stop the inetd daemon....
août 22 18:38:47 my_strech_server.avignon.inra.fr systemd[1]: Starting 
LSB: Speech Dispatcher...
août 22 18:38:47 my_strech_server.avignon.inra.fr systemd[1]: Starting 
LSB: Start/stop sysstat's sadc...
août 22 18:38:47 my_strech_server.avignon.inra.fr systemd[1]: Starting 
LSB: exim Mail Transport Agent...
août 22 18:38:47 my_strech_server.avignon.inra.fr systemd[1]: Starting 
Permit User Sessions...
août 22 18:38:47 my_strech_server.avignon.inra.fr systemd[1]: Starting 
The Apache HTTP Server...
août 22 18:38:47 my_strech_server.avignon.inra.fr systemd[1]: Starting 
LSB: Start Tomcat....
août 22 18:38:47 my_strech_server.avignon.inra.fr systemd[1]: Starting 
LSB: Start sfcb...
août 22 18:38:47 my_strech_server.avignon.inra.fr systemd[1]: Started 
LSB: The X Display Manager.
août 22 18:38:47 my_strech_server.avignon.inra.fr systemd[1]: Started 
LSB: Start or stop the inetd daemon..
août 22 18:38:47 my_strech_server.avignon.inra.fr gdomap[3806]: GNUstep 
distributed object mapper disabled, see /etc/default/gdomap.
août 22 18:38:47 my_strech_server.avignon.inra.fr systemd[1]: Started 
LSB: Start/stop sysstat's sadc.
août 22 18:38:47 my_strech_server.avignon.inra.fr systemd[1]: Started 
LSB: Start the GNUstep distributed object mapper.
août 22 18:38:47 my_strech_server.avignon.inra.fr 
speech-dispatcher[3811]: speech-dispatcher disabled; edit 
/etc/default/speech-dispatcher.
août 22 18:38:47 my_strech_server.avignon.inra.fr systemd[1]: Started 
LSB: Speech Dispatcher.
août 22 18:38:47 my_strech_server.avignon.inra.fr systemd[1]: Started 
Permit User Sessions.
août 22 18:38:47 my_strech_server.avignon.inra.fr systemd[1]: Starting 
Hold until boot process finishes up...
août 22 18:38:47 my_strech_server.avignon.inra.fr systemd[1]: Starting 
GNOME Display Manager...
août 22 18:38:48 my_strech_server.avignon.inra.fr systemd[1]: Started 
GNOME Display Manager.
août 22 18:38:48 my_strech_server.avignon.inra.fr systemd[1]: 
smbd.service: Supervising process 3860 which is not our child. We'll 
most likely not notice when it exits.
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: Enabling 
debugging
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: Changing 
user:group to Debian-gdm:Debian-gdm
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
Successfully connected to D-Bus
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmManager: GDM starting to manage displays
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmLocalDisplayFactory: Adding display on seat seat0
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmDisplay: id: (null)
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmDisplay: seat id: (null)
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmDisplay: session class: greeter
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmDisplay: initial: no
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmDisplay: allow timed login: yes
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmDisplay: local: yes
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmDisplay: session type: wayland
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmDisplay: seat id: seat0
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmDisplay: initial: yes
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmDisplayStore: Adding display 
/org/gnome/DisplayManager/Displays/94457410884384 to store
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmDisplay: Managing display: 
/org/gnome/DisplayManager/Displays/94457410884384
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmDisplay: Preparing display: 
/org/gnome/DisplayManager/Displays/94457410884384
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: doing 
initial setup? no
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmDisplay: prepare display
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmDisplay: Got automatic login details for display: 0
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmSession: Creating D-Bus server for worker for session
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmSession: D-Bus server for workers listening on 
unix:abstract=/tmp/dbus-4Mk0bNLU
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmSession: Creating D-Bus server for greeters and such
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmSession: D-Bus server for greeters listening on 
unix:abstract=/tmp/dbus-0akj8611
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmSession: Setting display device: (null)
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmDisplay: Running greeter
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmDisplay: Creating greeter for (null) (null)
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmLaunchEnvironment: Starting...
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmLaunchEnvironment: Setting up run time dir /var/run/gdm3/greeter
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmSession: Creating D-Bus server for worker for session
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmSession: D-Bus server for workers listening on 
unix:abstract=/tmp/dbus-iKmiTHbX
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmSession: Creating D-Bus server for greeters and such
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmSession: D-Bus server for greeters listening on 
unix:abstract=/tmp/dbus-Udx1l8hB
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmSession: Setting display device: (null)
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmSession: starting conversation gdm-launch-environment
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmSessionWorkerJob: Starting worker...
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmSessionWorkerJob: Running session_worker_job process: 
gdm-session-worker [pam/gdm-launch-environment] 
/usr/lib/gdm3/gdm-session-worker
août 22 18:38:48 my_strech_server.avignon.inra.fr kernel: Fusion MPT 
base driver 3.04.20
août 22 18:38:48 my_strech_server.avignon.inra.fr kernel: Copyright (c) 
1999-2008 LSI Corporation
août 22 18:38:48 my_strech_server.avignon.inra.fr kernel: Fusion MPT 
misc device (ioctl) driver 3.04.20
août 22 18:38:48 my_strech_server.avignon.inra.fr kernel: mptctl: 
Registered with Fusion MPT base driver
août 22 18:38:48 my_strech_server.avignon.inra.fr kernel: mptctl: 
/dev/mptctl @ (major,minor=10,220)
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmSessionWorkerJob: : SessionWorkerJob on pid 3909
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmSession: setting session to type 'wayland'
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmLocalDisplayFactory: display status changed: 1
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmManager: Accepting XDMCP connections...
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmXdmcpDisplayFactory: Start up on host 
my_strech_server.avignon.inra.fr, port 177
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmXdmcpDisplayFactory: addrinfo family=inet6 type=datagram proto=UDP 
flags=passive
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmXdmcpDisplayFactory: Attempting to bind to host :: port 177
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmXdmcpDisplayFactory: Starting to listen on XDMCP port
août 22 18:38:48 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: Enabling debugging
août 22 18:38:48 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: connecting to address: 
unix:abstract=/tmp/dbus-iKmiTHbX
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmDBusServer: new connection 0x55e8946c1650
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmSession: Handling new connection from worker
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmSession: Authenticating new connection
août 22 18:38:48 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: calling 
'ListCachedUsers'
août 22 18:38:48 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: Failed to identify the 
current session: Aucun périphérique ou adresse
août 22 18:38:48 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: seat 
unloaded, so trying to set loaded property
août 22 18:38:48 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: Listing 
cached users, so not setting loaded property
août 22 18:38:48 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: Listing 
cached users, so not setting loaded property
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmSession: worker connection is 0x55e8946c1650
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmSession: Emitting conversation-started signal
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmSession: Beginning setup for session for program using PAM service 
gdm-launch-environment
août 22 18:38:48 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmSession: Conversation started
août 22 18:38:48 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: attempting to change 
state to SETUP_COMPLETE
août 22 18:38:48 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: initializing PAM; 
service=gdm-launch-environment username=Debian-gdm seat=seat0
août 22 18:38:48 my_strech_server.avignon.inra.fr systemd[1]: Started 
Samba SMB Daemon.
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: Set PAM environment 
variable: 'XDG_SEAT=seat0'
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: Set PAM environment 
variable: 'XDG_SESSION_CLASS=greeter'
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: state SETUP_COMPLETE
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: 
ListCachedUsers finished, will set loaded property after list is fully 
loaded
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: tracking 
new user with object path /org/freedesk
top/Accounts/User5446
...
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: tracking 
new user with object path /org/freedesktop/Accounts/User5442
août 22 18:38:49 my_strech_server.avignon.inra.fr sfcb[3824]: Starting 
the small footprint CIM broker (SFCB):.
août 22 18:38:49 my_strech_server.avignon.inra.fr systemd[1]: Started 
LSB: Start sfcb.
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: tracking 
new user with object path /org/freedesktop/Accounts/User5441
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: tracking 
new user with object path /org/freedesktop/Accounts/User5449
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: unrefing 
manager owned by finished ListCachedUsers call
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: user 
first_user is now loaded
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: user 
first_user was not yet known, adding it
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: tracking 
user 'first_user'
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: not yet 
loaded, so not emitting user-added signal
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: not all 
users loaded yet
...
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: not all 
users loaded yet
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: user 
last_user is now loaded
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: user 
last_user was not yet known, adding it
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: tracking 
user 'last_user'
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: not yet 
loaded, so not emitting user-added signal
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: no 
pending users, trying to set loaded property
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: Seat 
wouldn't load, so giving up on it and setting loaded property
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: sending 
user-changed signal for user last_user
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: sent 
user-changed signal for user last_user
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: updating 
user last_user
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: attempting to change 
state to AUTHENTICATED
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: authenticating user 
Debian-gdm
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: state AUTHENTICATED
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: attempting to change 
state to AUTHORIZED
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: determining if 
authenticated user (password required:0) is authorized to session
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: state AUTHORIZED
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: attempting to change 
state to ACCREDITED
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: Set PAM environment 
variable: 'LOGNAME=Debian-gdm'
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: Set PAM environment 
variable: 'USER=Debian-gdm'
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: Set PAM environment 
variable: 'USERNAME=Debian-gdm'
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: Set PAM environment 
variable: 'HOME=/var/lib/gdm3'
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: Set PAM environment 
variable: 'SHELL=/bin/false'
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: Set PAM environment 
variable: 'PATH=/usr/local/bin:/usr/bin:/bin:/usr/games'
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: state ACCREDITED
août 22 18:38:49 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmSession: type wayland, program? yes, seat seat0
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: session display mode 
set to new-vt
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: Set PAM environment 
variable: 'XDG_SESSION_TYPE=wayland'
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: attempting to change 
state to ACCOUNT_DETAILS_SAVED
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: user Debian-gdm, not 
fully loaded yet, will save account details later
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: trying 
to track new user with username Debian-gdm
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: finding 
user 'Debian-gdm' state 1
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: finding 
user 'Debian-gdm' state 2
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: Looking 
for user 'Debian-gdm' in accounts service
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: new user 
in accounts service with object path /org/freedesktop/Accounts/User114
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: tracking 
new user with object path /org/freedesktop/Accounts/User114
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: Found 
object path of user 'Debian-gdm': /org/freedesktop/Accounts/User114
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: finding 
user 'Debian-gdm' state 3
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: user 
'Debian-gdm' fetched
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: finished 
handling request for user 'Debian-gdm'
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: unrefing 
manager owned by fetch user request
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: user 
Debian-gdm is now loaded
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: user 
Debian-gdm was not yet known, adding it
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: tracking 
user 'Debian-gdm'
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: loaded, 
so emitting user-added signal
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: no 
pending users, trying to set loaded property
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: already 
loaded, so not setting loaded property
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: sending 
user-changed signal for user Debian-gdm
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: sent 
user-changed signal for user Debian-gdm
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: updating 
user Debian-gdm
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: user 
Debian-gdm is now loaded
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: sessions 
changed (user Debian-gdm) num=0
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: no 
pending users, trying to set loaded property
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: already 
loaded, so not setting loaded property
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionSettings: saved session is
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionSettings: saved language is
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: saving account details 
for user Debian-gdm
août 22 18:38:49 my_strech_server.avignon.inra.fr exim4[3815]: Starting 
MTA: exim4.
août 22 18:38:49 my_strech_server.avignon.inra.fr systemd[1]: Started 
LSB: exim Mail Transport Agent.
août 22 18:38:49 my_strech_server.avignon.inra.fr systemd[1]: Started 
The Apache HTTP Server.
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: Error calling GetAll() 
when retrieving properties for /org/freedesktop/Accounts/User114: 
L'opération a été annulée
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: Error calling GetAll() 
when retrieving properties for /org/freedesktop/Accounts/User114: 
L'opération a été annulée
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: attempting to change 
state to SESSION_OPENED
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: Set PAM environment 
variable: 'XDG_VTNR=1'
août 22 18:38:49 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: pam_unix(gdm-launch-environment:session): 
session opened for user Debian-gdm by (uid=0)
... avahi-daemon ...
août 22 18:38:50 my_strech_server.avignon.inra.fr dbus[3330]: [system] 
Activating via systemd: service name='org.freedesktop.ConsoleKit' 
unit='console-kit-daemon.service'
août 22 18:38:50 my_strech_server.avignon.inra.fr systemd[1]: Starting 
Console Manager...
août 22 18:38:50 my_strech_server.avignon.inra.fr udev-acl.ck[4355]: 
g_slice_set_config: assertion 'sys_page_size == 0' failed
août 22 18:38:50 my_strech_server.avignon.inra.fr 
console-kit-daemon[4279]: missing action
août 22 18:38:50 my_strech_server.avignon.inra.fr dbus[3330]: [system] 
Successfully activated service 'org.freedesktop.ConsoleKit'
août 22 18:38:50 my_strech_server.avignon.inra.fr systemd[1]: Started 
Console Manager.
août 22 18:38:50 my_strech_server.avignon.inra.fr systemd[1]: Reloading 
OpenBSD Secure Shell server.
août 22 18:38:50 my_strech_server.avignon.inra.fr sshd[3438]: Received 
SIGHUP; restarting.
août 22 18:38:50 my_strech_server.avignon.inra.fr systemd[1]: Reloaded 
OpenBSD Secure Shell server.
août 22 18:38:50 my_strech_server.avignon.inra.fr sshd[3438]: Server 
listening on 0.0.0.0 port 22.
août 22 18:38:50 my_strech_server.avignon.inra.fr sshd[3438]: Server 
listening on :: port 22.
août 22 18:38:50 my_strech_server.avignon.inra.fr systemd[1]: Reloading 
OpenBSD Secure Shell server.
août 22 18:38:50 my_strech_server.avignon.inra.fr sshd[3438]: Received 
SIGHUP; restarting.
août 22 18:38:50 my_strech_server.avignon.inra.fr systemd[1]: Reloaded 
OpenBSD Secure Shell server.
août 22 18:38:50 my_strech_server.avignon.inra.fr sshd[3438]: Server 
listening on 0.0.0.0 port 22.
août 22 18:38:50 my_strech_server.avignon.inra.fr sshd[3438]: Server 
listening on :: port 22.
août 22 18:38:50 my_strech_server.avignon.inra.fr udev-acl.ck[4433]: 
g_slice_set_config: assertion 'sys_page_size == 0' failed
août 22 18:38:50 my_strech_server.avignon.inra.fr 
gdm-session-worker[3909]: Failed opening dbus connection: 
org.freedesktop.DBus.Error.FileNotFound: Failed to connect to socket 
/sys/fs/cgroup/cgmanager/sock: Aucun fichier ou dossier de ce type
août 22 18:38:50 my_strech_server.avignon.inra.fr PAM-CGM[3909]: Failed 
to connect to cgmanager
août 22 18:38:50 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: state SESSION_OPENED
août 22 18:38:50 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: sending 
user-changed signal for user Debian-gdm
août 22 18:38:50 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: sent 
user-changed signal for user Debian-gdm
août 22 18:38:50 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: AccountsService: ActUserManager: updating 
user Debian-gdm
août 22 18:38:50 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmSession: Emitting 'session-opened' signal
août 22 18:38:50 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmDisplay: Greeter session opened
août 22 18:38:50 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmDisplay: session id:
août 22 18:38:50 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmSession: Stopping all conversations except for gdm-launch-environment
août 22 18:38:50 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmSession: type wayland, program? yes, seat seat0
août 22 18:38:50 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmSession: type wayland, program? yes, seat seat0
août 22 18:38:50 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: Set PAM environment 
variable: 'GDM_LANG=fr_FR.UTF-8'
août 22 18:38:50 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: Set PAM environment 
variable: 'DCONF_PROFILE=gdm'
août 22 18:38:50 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: Set PAM environment 
variable: 'HOME=/var/lib/gdm3'
août 22 18:38:50 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: Set PAM environment 
variable: 'GDM_SEAT_ID=seat0'
août 22 18:38:50 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: Set PAM environment 
variable: 'RUNNING_UNDER_GDM=true'
août 22 18:38:50 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: Set PAM environment 
variable: 'GVFS_DISABLE_FUSE=1'
août 22 18:38:50 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: Set PAM environment 
variable: 'XDG_CURRENT_DESKTOP=GNOME-Greeter:GNOME'
août 22 18:38:50 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: Set PAM environment 
variable: 'LANG=fr_FR.UTF-8'
août 22 18:38:50 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: Set PAM environment 
variable: 'LOGNAME=Debian-gdm'
août 22 18:38:50 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: Set PAM environment 
variable: 'GVFS_REMOTE_VOLUME_MONITOR_IGNORE=1'
août 22 18:38:50 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: Set PAM environment 
variable: 'GIO_USE_VFS=local'
août 22 18:38:50 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: Set PAM environment 
variable: 'GDM_VERSION=3.22.3'
août 22 18:38:50 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: Set PAM environment 
variable: 'GNOME_SHELL_SESSION_MODE=gdm'
août 22 18:38:50 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: Set PAM environment 
variable: 'USERNAME=Debian-gdm'
août 22 18:38:50 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: Set PAM environment 
variable: 'PWD=/var/lib/gdm3'
août 22 18:38:50 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: Set PAM environment 
variable: 'USER=Debian-gdm'
août 22 18:38:50 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: Set PAM environment 
variable: 
'PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin'
août 22 18:38:50 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: Set PAM environment 
variable: 'SHELL=/bin/false'
août 22 18:38:50 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: Set PAM environment 
variable: 
'XDG_DATA_DIRS=/usr/share/gdm/greeter:/usr/local/share/:/usr/share/'
août 22 18:38:50 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: start program: 
/usr/lib/gdm3/gdm-wayland-session "gnome-session --autostart 
/usr/share/gdm/greeter/autostart --debug"
août 22 18:38:50 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: attempting to change 
state to SESSION_STARTED
août 22 18:38:50 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: opening session for 
program '/usr/lib/gdm3/gdm-wayland-session'
août 22 18:38:50 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: jumping to VT 1
août 22 18:38:50 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: first setting graphics 
mode to prevent flicker
août 22 18:38:50 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: VT mode did need to be 
fixed
août 22 18:38:50 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: session opened creating 
reply...
août 22 18:38:50 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: state SESSION_STARTED
août 22 18:38:50 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSession worker: watching pid 4434
août 22 18:38:50 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmSession: Emitting 'session-started' signal with pid '4434'
août 22 18:38:50 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmDisplay: Greeter started
août 22 18:38:50 my_strech_server.avignon.inra.fr 
gdm-wayland-session[4434]: Enabling debugging
août 22 18:38:50 my_strech_server.avignon.inra.fr 
gdm-wayland-session[4434]: Running session message bus
août 22 18:38:50 my_strech_server.avignon.inra.fr avahi-daemon[4262]: 
Server startup complete. Host name is my_strech_server.local. Local 
service cookie is 3175672092.
août 22 18:38:51 my_strech_server.avignon.inra.fr 
/usr/lib/gdm3/gdm-wayland-session[4434]: Activating service 
name='org.freedesktop.systemd1'
août 22 18:38:51 my_strech_server.avignon.inra.fr systemd-shim[4519]: 
Could not connect to cgmanager: Could not connect: No such file or directory
août 22 18:38:51 my_strech_server.avignon.inra.fr systemd-shim[4519]: 
Unable to acquire bus name 'org.freedesktop.systemd1'.  Quitting.
août 22 18:38:51 my_strech_server.avignon.inra.fr 
/usr/lib/gdm3/gdm-wayland-session[4434]: Activated service 
'org.freedesktop.systemd1' failed: Process org.freedesktop.systemd1 
exited with status 1
août 22 18:38:51 my_strech_server.avignon.inra.fr 
gdm-wayland-session[4434]: could not fetch environment: 
GDBus.Error:org.freedesktop.DBus.Error.Spawn.ChildExited: Process 
org.freedesktop.systemd1 exited with status 1
août 22 18:38:51 my_strech_server.avignon.inra.fr 
gdm-wayland-session[4434]: Running wayland session
août 22 18:38:51 my_strech_server.avignon.inra.fr sfcb[4162]: *** Failed 
to load libcmpiTunnelProvider.so for TunnelInterOpProvider
août 22 18:38:51 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmManager: trying to register new display
oût 22 18:38:51 my_strech_server.avignon.inra.fr gdm3[3858]: GdmManager: 
Error while retrieving session id for sender: Error getting session id 
from systemd: Aucun périphérique ou adresse
août 22 18:38:51 my_strech_server.avignon.inra.fr 
gdm-wayland-session[4434]: Could not register display: 
GDBus.Error:org.freedesktop.DBus.Error.AccessDenied: Aucun affichage 
disponible
août 22 18:38:51 my_strech_server.avignon.inra.fr 
/usr/lib/gdm3/gdm-wayland-session[4434]: Unable to register display with 
display manager
août 22 18:38:51 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: child (pid:4434) done 
(status:70)
août 22 18:38:51 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: uninitializing PAM
août 22 18:38:51 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: pam_unix(gdm-launch-environment:session): 
session closed for user Debian-gdm
août 22 18:38:51 my_strech_server.avignon.inra.fr 
gdm-session-worker[3909]: Failed opening dbus connection: 
org.freedesktop.DBus.Error.FileNotFound: Failed to connect to socket 
/sys/fs/cgroup/cgmanager/sock: Aucun fichier ou dossier de ce type
août 22 18:38:51 my_strech_server.avignon.inra.fr 
gdm-launch-environment][3909]: GdmSessionWorker: state NONE
août 22 18:38:51 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmSession: Emitting 'session-exited' signal with exit code '70'
août 22 18:38:51 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmSession: stopping conversation gdm-launch-environment
août 22 18:38:51 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmSessionWorkerJob: Stopping job pid:3909
août 22 18:38:51 my_strech_server.avignon.inra.fr gdm3[3858]: GdmCommon: 
sending signal 15 to process 3909
août 22 18:38:51 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmDisplay: Greeter exited: 70
août 22 18:38:51 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmLocalDisplayFactory: display status changed: 3
août 22 18:38:51 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmDisplayStore: Unreffing display: 0x55e8946c1320
-> second loop begins ...
août 22 18:38:51 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmLocalDisplayFactory: Adding display on seat seat0
août 22 18:38:51 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmDisplay: id: (null)
août 22 18:38:51 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmDisplay: seat id: (null)
août 22 18:38:51 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmDisplay: session class: greeter
août 22 18:38:51 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmDisplay: initial: no
août 22 18:38:51 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmDisplay: allow timed login: yes
août 22 18:38:51 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmDisplay: local: yes
août 22 18:38:51 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmDisplay: session type: wayland
août 22 18:38:51 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmDisplay: seat id: seat0
août 22 18:38:51 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmDisplay: initial: yes
août 22 18:38:51 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmDisplayStore: Adding display 
/org/gnome/DisplayManager/Displays/94457410884640 to store
août 22 18:38:51 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmDisplay: Managing display: 
/org/gnome/DisplayManager/Displays/94457410884640
août 22 18:38:51 my_strech_server.avignon.inra.fr gdm3[3858]: 
GdmDisplay: Preparing display: 
/org/gnome/DisplayManager/Displays/94457410884640
...
...
août 22 18:40:57 my_strech_server.avignon.inra.fr 
/usr/lib/gdm3/gdm-wayland-session[22048]: Activating service 
name='org.freedesktop.systemd1'
août 22 18:40:57 my_strech_server.avignon.inra.fr systemd-shim[22053]: 
Could not connect to cgmanager: Could not connect: No such file or directory
août 22 18:40:57 my_strech_server.avignon.inra.fr systemd-shim[22053]: 
Unable to acquire bus name 'org.freedesktop.systemd1'.  Quitting.
août 22 18:40:57 my_strech_server.avignon.inra.fr 
/usr/lib/gdm3/gdm-wayland-session[22048]: Activated service 
'org.freedesktop.systemd1' failed: Process org.freed
esktop.systemd1 exited with status 1
août 22 18:40:57 my_strech_server.avignon.inra.fr 
/usr/lib/gdm3/gdm-wayland-session[22048]: Unable to register display 
with display manager
août 22 18:40:57 my_strech_server.avignon.inra.fr 
gdm-launch-environment][22037]: 
pam_unix(gdm-launch-environment:session): session closed for user Debian-gdm
août 22 18:40:57 my_strech_server.avignon.inra.fr 
gdm-session-worker[22037]: Failed opening dbus connection: 
org.freedesktop.DBus.Error.FileNotFound: Failed to co
nnect to socket /sys/fs/cgroup/cgmanager/sock: Aucun fichier ou dossier 
de ce type
août 22 18:40:57 my_strech_server.avignon.inra.fr udev-acl.ck[22071]: 
g_slice_set_config: assertion 'sys_page_size == 0' failed
août 22 18:40:57 my_strech_server.avignon.inra.fr 
console-kit-daemon[4279]: console-kit-daemon[4279]: GLib-CRITICAL: 
Source ID 6526 was not found when attempting
to remove it
août 22 18:40:57 my_strech_server.avignon.inra.fr 
console-kit-daemon[4279]: GLib-CRITICAL: Source ID 6526 was not found 
when attempting to remove it
août 22 18:40:57 my_strech_server.avignon.inra.fr gdm3[3858]: Child 
process -22048 was already dead.
août 22 18:40:57 my_strech_server.avignon.inra.fr gdm3[3858]: Child 
process 22037 was already dead.
août 22 18:40:57 my_strech_server.avignon.inra.fr gdm3[3858]: Unable to 
kill session worker process
août 22 18:40:58 my_strech_server.avignon.inra.fr 
gdm-launch-environment][22072]: 
pam_unix(gdm-launch-environment:session): session opened for user 
Debian-gdm by
(uid=0)
août 22 18:40:58 my_strech_server.avignon.inra.fr udev-acl.ck[22082]: 
g_slice_set_config: assertion 'sys_page_size == 0' failed
août 22 18:40:58 my_strech_server.avignon.inra.fr 
gdm-session-worker[22072]: Failed opening dbus connection: 
org.freedesktop.DBus.Error.FileNotFound: Failed to co
nnect to socket /sys/fs/cgroup/cgmanager/sock: Aucun fichier ou dossier 
de ce type
août 22 18:40:58 my_strech_server.avignon.inra.fr PAM-CGM[22072]: Failed 
to connect to cgmanager
août 22 18:40:58 my_strech_server.avignon.inra.fr 
/usr/lib/gdm3/gdm-wayland-session[22083]: Activating service 
name='org.freedesktop.systemd1'
août 22 18:40:58 my_strech_server.avignon.inra.fr systemd-shim[22088]: 
Could not connect to cgmanager: Could not connect: No such file or directory
août 22 18:40:58 my_strech_server.avignon.inra.fr systemd-shim[22088]: 
Unable to acquire bus name 'org.freedesktop.systemd1'.  Quitting.
août 22 18:40:58 my_strech_server.avignon.inra.fr 
/usr/lib/gdm3/gdm-wayland-session[22083]: Activated service 
'org.freedesktop.systemd1' failed: Process org.freedesktop.systemd1 
exited with status 1
août 22 18:40:58 my_strech_server.avignon.inra.fr 
/usr/lib/gdm3/gdm-wayland-session[22083]: Unable to register display 
with display manager
août 22 18:40:58 my_strech_server.avignon.inra.fr 
gdm-launch-environment][22072]: 
pam_unix(gdm-launch-environment:session): session closed for user Debian-gdm
août 22 18:40:58 my_strech_server.avignon.inra.fr 
gdm-session-worker[22072]: Failed opening dbus connection: 
org.freedesktop.DBus.Error.FileNotFound: Failed to connect to socket 
/sys/fs/cgroup/cgmanager/sock: Aucun fichier ou dossier de ce type
août 22 18:40:58 my_strech_server.avignon.inra.fr udev-acl.ck[22106]: 
g_slice_set_config: assertion 'sys_page_size == 0' failed
août 22 18:40:58 my_strech_server.avignon.inra.fr 
console-kit-daemon[4279]: console-kit-daemon[4279]: GLib-CRITICAL: 
Source ID 6539 was not found when attempting to remove it
août 22 18:40:58 my_strech_server.avignon.inra.fr 
console-kit-daemon[4279]: GLib-CRITICAL: Source ID 6539 was not found 
when attempting to remove it
août 22 18:40:58 my_strech_server.avignon.inra.fr gdm3[3858]: Child 
process -22083 was already dead.
août 22 18:40:58 my_strech_server.avignon.inra.fr gdm3[3858]: Child 
process 22072 was already dead.
août 22 18:40:58 my_strech_server.avignon.inra.fr gdm3[3858]: Unable to 
kill session worker process
août 22 18:40:58 my_strech_server.avignon.inra.fr 
gdm-launch-environment][22107]: 
pam_unix(gdm-launch-environment:session): session opened for user 
Debian-gdm by (uid=0)
août 22 18:40:58 my_strech_server.avignon.inra.fr udev-acl.ck[22117]: 
g_slice_set_config: assertion 'sys_page_size == 0' failed
août 22 18:40:58 my_strech_server.avignon.inra.fr 
gdm-session-worker[22107]: Failed opening dbus connection: 
org.freedesktop.DBus.Error.FileNotFound: Failed to connect to socket 
/sys/fs/cgroup/cgmanager/sock: Aucun fichier ou dossier de ce type
août 22 18:40:58 my_strech_server.avignon.inra.fr PAM-CGM[22107]: Failed 
to connect to cgmanager
août 22 18:40:58 my_strech_server.avignon.inra.fr 
/usr/lib/gdm3/gdm-wayland-session[22118]: Activating service 
name='org.freedesktop.systemd1'
août 22 18:40:58 my_strech_server.avignon.inra.fr systemd-shim[22123]: 
Could not connect to cgmanager: Could not connect: No such file or directory
août 22 18:40:58 my_strech_server.avignon.inra.fr 
/usr/lib/gdm3/gdm-wayland-session[22118]: Activating service 
name='org.freedesktop.systemd1'
août 22 18:40:58 my_strech_server.avignon.inra.fr systemd-shim[22123]: 
Could not connect to cgmanager: Could not connect: No such file or directory
août 22 18:40:58 my_strech_server.avignon.inra.fr systemd-shim[22123]: 
Unable to acquire bus name 'org.freedesktop.systemd1'.  Quitting.
août 22 18:40:58 my_strech_server.avignon.inra.fr 
/usr/lib/gdm3/gdm-wayland-session[22118]: Activated service 
'org.freedesktop.systemd1' failed: Process org.freedesktop.systemd1 
exited with status 1
août 22 18:40:58 my_strech_server.avignon.inra.fr 
/usr/lib/gdm3/gdm-wayland-session[22118]: Unable to register display 
with display manager
août 22 18:40:58 my_strech_server.avignon.inra.fr 
gdm-launch-environment][22107]: 
pam_unix(gdm-launch-environment:session): session closed for user Debian-gdm
août 22 18:40:58 my_strech_server.avignon.inra.fr 
gdm-session-worker[22107]: Failed opening dbus connection: 
org.freedesktop.DBus.Error.FileNotFound: Failed to connect to socket 
/sys/fs/cgroup/cgmanager/sock: Aucun fichier ou dossier de ce type
août 22 18:40:58 my_strech_server.avignon.inra.fr gdm3[3858]: Could not 
start command '/usr/lib/gdm3/gdm-session-worker': Trop de fichiers ouverts
août 22 18:40:58 my_strech_server.avignon.inra.fr gdm3[3858]: GLib: 
g_child_watch_add_full: assertion 'pid > 0' failed
août 22 18:40:58 my_strech_server.avignon.inra.fr gdm3[3858]: Child 
process -22118 was already dead.
août 22 18:40:58 my_strech_server.avignon.inra.fr gdm3[3858]: Child 
process 22107 was already dead.
août 22 18:40:58 my_strech_server.avignon.inra.fr gdm3[3858]: Unable to 
kill session worker process
août 22 18:40:58 my_strech_server.avignon.inra.fr udev-acl.ck[22141]: 
g_slice_set_config: assertion 'sys_page_size == 0' failed
août 22 18:40:58 my_strech_server.avignon.inra.fr 
console-kit-daemon[4279]: console-kit-daemon[4279]: GLib-CRITICAL: 
Source ID 6552 was not found when attempting to remove it
août 22 18:40:58 my_strech_server.avignon.inra.fr 
console-kit-daemon[4279]: GLib-CRITICAL: Source ID 6552 was not found 
when attempting to remove it
--> no more lines till the connexion of root with ssh
août 22 18:43:24 my_strech_server.avignon.inra.fr sshd[22166]: Accepted 
password for root from 147.b.c.d port 39704 ssh2
août 22 18:43:24 my_strech_server.avignon.inra.fr sshd[22166]: 
pam_unix(sshd:session): session opened for user root by (uid=0)
août 22 18:43:24 my_strech_server.avignon.inra.fr udev-acl.ck[22172]: 
g_slice_set_config: assertion 'sys_page_size == 0' failed
août 22 18:43:24 my_strech_server.avignon.inra.fr 
console-kit-daemon[4279]: missing action
août 22 18:43:24 my_strech_server.avignon.inra.fr PAM-CGM[22166]: Failed 
to connect to cgmanager
--> last 3 errors probably because cgmanager.service is dead (why?). No 
more error after the restart of cgmanager.

2. For xdmcp requests from other X servers

On the workstation (Windows 7), a few seconds after having launched 
Cygwin/X with 'XWin:0 -query my_stretch_server ...', a window is 
displayed with the following message:
A fatal error has occured and Cygwin/X will now exit.
XDMCP fatal error: Session declined Maximum number of open sessions from 
your host reached.

With the same workstation, same tool and same method, I can open X 
sessions on a old Debian server (squeeze 6.0.7) using gdm (2.20.11-4) 
and xfce (4.6.2), and then connect with ssh -X to my_stretch_server.

On the server, I see only a few lines in /var/log/messages:
Aug 23 18:19:21 my_stretch_server gdm3: Unable to connect to display 
147.b.c.d:0
Aug 23 18:19:22 my_stretch_server gdm3: Unable to connect to display 
147.b.c.d:0
Aug 23 18:19:22 my_stretch_server gdm3: Unable to connect to display 
147.b.c.d:0
Aug 23 18:19:23 my_stretch_server gdm3: Unable to connect to display 
147.b.c.d:0
Aug 23 18:19:23 my_stretch_server gdm3: gdm_xdmcp_handle_manage: Got 
Manage from banned host 147.b.c.d
Aug 23 18:19:23 my_stretch_server gdm3: Unable to connect to display 
147.b.c.d:0
Aug 23 18:19:24 my_stretch_server gdm3: Unable to connect to display 
147.b.c.d:0
Aug 23 18:19:24 my_stretch_server gdm3: Unable to connect to display 
147.b.c.d:0
Aug 23 18:19:25 my_stretch_server gdm3: Unable to connect to display 
147.b.c.d:0
Aug 23 18:19:25 my_stretch_server gdm3: Unable to connect to display 
147.b.c.d:0
Aug 23 18:19:26 my_stretch_server gdm3: Unable to connect to display 
147.b.c.d:0
Aug 23 18:19:26 my_stretch_server gdm3: Unable to connect to display 
after 10 tries - bailing out
Aug 23 18:19:27 my_stretch_server gdm3: GdmXdmcpDisplayFactory: Failed 
to look up session ID 388766185

/var/log/syslog contains more messages, that could let think to the 
following scenario:
- GdmXdmcpDisplayFactory receives the query from 147.b.c.d and tries to 
create the xdmcp display
- GdmDisplay tries to prepare the display and to create the greeter for 
147.b.c.d
- GdmLaunchEnvironment starts and maybe fails (Unknown user Debian-gdm - 
gdm3: GLib-GObject: g_object_set: assertion 'G_IS_OBJECT (object)' failed)
- GdmDisplay tries 10 folds to open display 147.b.c.d:0 but fails (gdm3: 
Unable to connect to display 147.b.c.d:0)
- After these 10 trials gdm3 asks GdmDisplay to unmanage the display
- GdmXdmcpDisplayFactory sends REFUSE to the opened session and DECLINE 
to 147.b.c.d

What I get with systemctl -alb

août 23 18:19:19 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: decode_packet: GIOCondition 1
août 23 18:19:19 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmAddress: looking up hostname: my_stretch_server.avignon.inra.fr
août 23 18:19:19 my_stretch_server.avignon.inra.fr gdm3[42904]: 
gdm_peek_local_address_list: Could not get address from hostname!
août 23 18:19:19 my_stretch_server.avignon.inra.fr gdm3[42904]: Address 
family:10 (inet6) host:147.b.c.d port:63862 local:0 loopback:0
août 23 18:19:19 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: Received opcode QUERY from client 147.b.c.d : 63862
août 23 18:19:19 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: Sending WILLING to 147.b.c.d
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: decode_packet: GIOCondition 1
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: Address 
family:10 (inet6) host:147.b.c.d port:63862 local:0 loopback:0
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: Received opcode REQUEST from client 147.b.c.d : 
63862
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: Got REQUEST from 147.b.c.d
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: xdmcp_pending=0, MaxPending=4, xdmcp_sessions=0, 
MaxSessions=16, ManufacturerID=
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: display_dispose_check (147.b.c.d:0)
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: Creating xdmcp display for 147.b.c.d:0
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: Host 147.b.c.d not found
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmDisplay: allow timed login: no
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmDisplay: id: (null)
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmDisplay: seat id: (null)
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmDisplay: session class: greeter
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmDisplay: initial: no
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmDisplay: allow timed login: yes
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmDisplay: local: no
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: Address 
family:10 (inet6) host:147.b.c.d port:63862 local:0 loopback:0
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmDisplay: Preparing display: 
/org/gnome/DisplayManager/Displays/94414382079776
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmDisplayAccessFile: creating xauth directory 
/var/run/gdm3/auth-for-Debian-gdm-XXXXXX
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmDisplayAccessFile: chowning /var/run/gdm3/auth-for-Debian-gdm-fU7kLv 
to 114:123
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmDisplayAccessFile: creating 
/var/run/gdm3/auth-for-Debian-gdm-fU7kLv/database
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmDisplayAccessFile: chowning 
/var/run/gdm3/auth-for-Debian-gdm-fU7kLv/database to 114:123
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmDisplayAccessFile: chmoding /var/run/gdm3/auth-for-Debian-gdm-fU7kLv 
to 0711
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmDisplay: prepare display
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmDisplayStore: Adding display 
/org/gnome/DisplayManager/Displays/94414382079776 to store
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: Sending authorization key for display 147.b.c.d:0
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: cookie len 16
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: Sending ACCEPT to 147.b.c.d with SessionID=388766185
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: decode_packet: GIOCondition 1
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: Address 
family:10 (inet6) host:147.b.c.d port:63862 local:0 loopback:0
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: Received opcode MANAGE from client 147.b.c.d : 63862
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: Got MANAGE from 147.b.c.d
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: Got display=0, SessionID=388766185 
Class=MIT-unspecified from 147.b.c.d
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: Looked up 147.b.c.d:0
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: Host 147.b.c.d not found
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: Host 147.b.c.d not found
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmDisplay: Managing display: 
/org/gnome/DisplayManager/Displays/94414382079776
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmSession: Creating D-Bus server for worker for session
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmSession: D-Bus server for workers listening on 
unix:abstract=/tmp/dbus-VR56x7YY
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmSession: Creating D-Bus server for greeters and such
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmSession: D-Bus server for greeters listening on 
unix:abstract=/tmp/dbus-XWEaEtjM
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmSession: Setting display device: (null)
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmDisplay: Running greeter
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmDisplay: Creating greeter for 147.b.c.d:0 147.b.c.d
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmLaunchEnvironment: Starting...
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmLaunchEnvironment: Unknown user Debian-gdm
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GLib-GObject: g_object_set: assertion 'G_IS_OBJECT (object)' failed
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmLocalDisplayFactory: display status changed: 2
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: xdmcp display status changed: 2
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmDisplay: Server is ready - opening display 147.b.c.d:0
août 23 18:19:21 my_stretch_server.avignon.inra.fr gdm3[42904]: Unable 
to connect to display 147.b.c.d:0
août 23 18:19:22 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmDisplay: Server is ready - opening display 147.b.c.d:0
août 23 18:19:22 my_stretch_server.avignon.inra.fr gdm3[42904]: Unable 
to connect to display 147.b.c.d:0
août 23 18:19:22 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmDisplay: Server is ready - opening display 147.b.c.d:0
août 23 18:19:22 my_stretch_server.avignon.inra.fr gdm3[42904]: Unable 
to connect to display 147.b.c.d:0
août 23 18:19:23 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmDisplay: Server is ready - opening display 147.b.c.d:0
août 23 18:19:23 my_stretch_server.avignon.inra.fr gdm3[42904]: Unable 
to connect to display 147.b.c.d:0
août 23 18:19:23 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: decode_packet: GIOCondition 1
août 23 18:19:23 my_stretch_server.avignon.inra.fr gdm3[42904]: Address 
family:10 (inet6) host:147.b.c.d port:63862 local:0 loopback:0
août 23 18:19:23 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: Received opcode MANAGE from client 147.b.c.d : 63862
août 23 18:19:23 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: Got MANAGE from 147.b.c.d
août 23 18:19:23 my_stretch_server.avignon.inra.fr gdm3[42904]: warning: 
cannot open /etc/hosts.allow: Trop de fichiers ouverts
août 23 18:19:23 my_stretch_server.avignon.inra.fr gdm3[42904]: warning: 
cannot open /etc/hosts.deny: Trop de fichiers ouverts
août 23 18:19:23 my_stretch_server.avignon.inra.fr gdm3[42904]: 
gdm_xdmcp_handle_manage: Got Manage from banned host 147.b.c.d
août 23 18:19:23 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmDisplay: Server is ready - opening display 147.b.c.d:0
août 23 18:19:23 my_stretch_server.avignon.inra.fr gdm3[42904]: Unable 
to connect to display 147.b.c.d:0
août 23 18:19:24 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmDisplay: Server is ready - opening display 147.b.c.d:0
août 23 18:19:24 my_stretch_server.avignon.inra.fr gdm3[42904]: Unable 
to connect to display 147.b.c.d:0
août 23 18:19:24 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmDisplay: Server is ready - opening display 147.b.c.d:0
août 23 18:19:24 my_stretch_server.avignon.inra.fr gdm3[42904]: Unable 
to connect to display 147.b.c.d:0
août 23 18:19:25 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmDisplay: Server is ready - opening display 147.b.c.d:0
août 23 18:19:25 my_stretch_server.avignon.inra.fr gdm3[42904]: Unable 
to connect to display 147.b.c.d:0
août 23 18:19:25 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmDisplay: Server is ready - opening display 147.b.c.d:0
août 23 18:19:25 my_stretch_server.avignon.inra.fr gdm3[42904]: Unable 
to connect to display 147.b.c.d:0
août 23 18:19:26 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmDisplay: Server is ready - opening display 147.b.c.d:0
août 23 18:19:26 my_stretch_server.avignon.inra.fr gdm3[42904]: Unable 
to connect to display 147.b.c.d:0
août 23 18:19:26 my_stretch_server.avignon.inra.fr gdm3[42904]: Unable 
to connect to display after 10 tries - bailing out
août 23 18:19:26 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmDisplay: unmanage display
août 23 18:19:26 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmLocalDisplayFactory: display status changed: 0
août 23 18:19:26 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: xdmcp display status changed: 0
août 23 18:19:27 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: decode_packet: GIOCondition 1
août 23 18:19:27 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmAddress: looking up hostname: my_stretch_server.avignon.inra.fr
août 23 18:19:27 my_stretch_server.avignon.inra.fr gdm3[42904]: 
gdm_peek_local_address_list: Could not get address from hostname!
août 23 18:19:27 my_stretch_server.avignon.inra.fr gdm3[42904]: Address 
family:10 (inet6) host:147.b.c.d port:63862 local:0 loopback:0
août 23 18:19:27 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: Received opcode MANAGE from client 147.b.c.d : 63862
août 23 18:19:27 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: Got MANAGE from 147.b.c.d
août 23 18:19:27 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: Got display=0, SessionID=388766185 
Class=MIT-unspecified from 147.b.c.d
août 23 18:19:27 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: Failed to look up session ID 388766185
août 23 18:19:27 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: Sending REFUSE to 388766185
août 23 18:19:27 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: Host 147.b.c.d not found
août 23 18:19:27 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: decode_packet: GIOCondition 1
août 23 18:19:27 my_stretch_server.avignon.inra.fr gdm3[42904]: Address 
family:10 (inet6) host:147.b.c.d port:63862 local:0 loopback:0
août 23 18:19:27 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: Received opcode REQUEST from client 147.b.c.d : 
63862
août 23 18:19:27 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: Got REQUEST from 147.b.c.d
août 23 18:19:27 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: xdmcp_pending=1, MaxPending=4, xdmcp_sessions=0, 
MaxSessions=16, ManufacturerID=
août 23 18:19:27 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: Maximum number of open XDMCP sessions from host 
147.b.c.d reached
août 23 18:19:27 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: Sending DECLINE to 147.b.c.d
août 23 18:19:27 my_stretch_server.avignon.inra.fr gdm3[42904]: 
GdmXdmcpDisplayFactory: Host 147.b.c.d not found

-- System Information:
Debian Release: 9.1
   APT prefers stable
   APT policy: (500, 'stable')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.9.0-3-amd64 (SMP w/80 CPU cores)
Locale: LANG=fr_FR.UTF-8, LC_CTYPE=fr_FR.UTF-8 (charmap=UTF-8) (ignored: 
LC_ALL set to fr_FR.UTF-8), LANGUAGE=fr_FR.UTF-8 (charmap=UTF-8) 
(ignored: LC_ALL set to fr_FR.UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages gdm3 depends on:
ii  accountsservice                              0.6.43-1
ii  adduser                                      3.115
ii  dconf-cli                                    0.26.0-2+b1
ii  dconf-gsettings-backend                      0.26.0-2+b1
ii  debconf [debconf-2.0]                        1.5.61
ii  gir1.2-gdm-1.0                               3.22.3-3
ii  gnome-session [x-session-manager]            3.22.3-1
ii  gnome-session-bin                            3.22.3-1
ii  gnome-session-flashback [x-session-manager]  3.22.0-3
ii  gnome-settings-daemon                        3.22.2-2+deb9u2
ii  gnome-shell                                  3.22.3-3
ii  gnome-terminal [x-terminal-emulator]         3.22.2-1
ii  gsettings-desktop-schemas                    3.22.0-1
ii  libaccountsservice0                          0.6.43-1
ii  libaudit1                                    1:2.6.7-2
ii  libc6                                        2.24-11+deb9u1
ii  libcanberra-gtk3-0                           0.30-3
ii  libcanberra0                                 0.30-3
ii  libgdk-pixbuf2.0-0                           2.36.5-2
ii  libgdm1                                      3.22.3-3
ii  libglib2.0-0                                 2.50.3-2
ii  libglib2.0-bin                               2.50.3-2
ii  libgtk-3-0                                   3.22.11-1
ii  libkeyutils1                                 1.5.9-9
ii  libpam-modules                               1.1.8-3.6
ii  libpam-runtime                               1.1.8-3.6
ii  libpam-systemd                               232-25+deb9u1
ii  libpam0g                                     1.1.8-3.6
ii  librsvg2-common                              2.40.16-1+b1
ii  libselinux1                                  2.6-3+b1
ii  libsystemd0                                  232-25+deb9u1
ii  libwrap0                                     7.6.q-26
ii  libx11-6                                     2:1.6.4-3
ii  libxau6                                      1:1.0.8-1
ii  libxcb1                                      1.12-1
ii  libxdmcp6                                    1:1.1.2-3
ii  lsb-base                                     9.20161125
ii  metacity [x-window-manager]                  1:3.22.1-1
ii  mutter [x-window-manager]                    3.22.3-2
ii  policykit-1                                  0.105-18
ii  ucf                                          3.0036
ii  x11-common                                   1:7.7+19
ii  x11-xserver-utils                            7.7+7+b1
ii  xterm [x-terminal-emulator]                  327-2

Versions of packages gdm3 recommends:
ii  at-spi2-core    2.22.0-6
ii  desktop-base    9.0.2
ii  x11-xkb-utils   7.7+3+b1
ii  xserver-xephyr  2:1.19.2-1+deb9u1
ii  xserver-xorg    1:7.7+19
ii  zenity          3.22.0-1+b1

Versions of packages gdm3 suggests:
ii  gnome-orca            3.22.2-3
ii  libpam-gnome-keyring  3.20.0-3

-- Configuration Files:
/etc/gdm3/daemon.conf changed:
[daemon]
[security]
DisallowTCP = false
[xdmcp]
Enable = true
[chooser]
[debug]
Enable = true

/etc/pam.d/gdm-launch-environment
#%PAM-1.0
auth    requisite       pam_nologin.so
auth    required        pam_permit.so
@include common-account
session optional        pam_keyinit.so force revoke
session required        pam_limits.so
session required        pam_env.so readenv=1
session required        pam_env.so readenv=1 envfile=/etc/default/locale
@include common-session
@include common-password

/etc/pam.d/gdm-password
#%PAM-1.0
auth    requisite       pam_nologin.so
auth    required    pam_succeed_if.so user != root quiet_success
@include common-auth
auth    optional        pam_gnome_keyring.so
@include common-account
# SELinux needs to be the first session rule. This ensures that any
# lingering context has been cleared. Without this it is possible
# that a module could execute code in the wrong domain.
session [success=ok ignore=ignore module_unknown=ignore 
default=bad]        pam_selinux.so close
session required        pam_loginuid.so
# SELinux needs to intervene at login time to ensure that the process
# starts in the proper default security context. Only sessions which are
# intended to run in the user's context should be run after this.
session [success=ok ignore=ignore module_unknown=ignore 
default=bad]        pam_selinux.so open
session optional        pam_keyinit.so force revoke
session required        pam_limits.so
session required        pam_env.so readenv=1
session required        pam_env.so readenv=1 envfile=/etc/default/locale
@include common-session
session optional        pam_gnome_keyring.so auto_start
@include common-password

/etc/pam.d/common-session
#
# As of pam 1.0.1-6, this file is managed by pam-auth-update by default.
# To take advantage of this, it is recommended that you configure any
# local modules either before or after the default block, and use
# pam-auth-update to manage selection of other modules.  See
# pam-auth-update(8) for details.

# here are the per-package modules (the "Primary" block)
session    [default=1]            pam_permit.so
# here's the fallback if no module succeeds
session    requisite            pam_deny.so
# prime the stack with a positive return value if there isn't one already;
# this avoids us returning an error just because nothing sets a success code
# since the modules above will each just jump around
session    required            pam_permit.so
# and here are more per-package modules (the "Additional" block)
session    required    pam_unix.so
session    optional            pam_winbind.so
session    optional    pam_mount.so
session    optional            pam_ldap.so
session    optional            pam_ck_connector.so nox11
session    optional    pam_cgm.so -c freezer
# end of pam-auth-update config

-- debconf information:
* shared/default-x-display-manager: gdm3
   gdm3/daemon_name: /usr/sbin/gdm3