Bug#940549: [gdm3] gdm3 seems to not respect x-session-manager since Buster

[Adrien Grellier]

Package: gdm3
Version: 3.30.2-3
Severity: normal

Hi,

We are using gdm3 with KDE Plasma desktop as a default Linux desktop for
our users (Authentication with LDAP).

Plasma is configured system wide as the default session with
update-alternatives :

root at pc-lheea182:~# update-alternatives --config x-session-manager
Il existe 4 choix pour l'alternative x-session-manager (qui fournit
/usr/bin/x-session-manager).

  Sélection   Chemin                  Priorité  État
------------------------------------------------------------
  0            /usr/bin/gnome-session   50        mode automatique
  1            /usr/bin/gnome-session   50        mode manuel
* 2            /usr/bin/startkde        40        mode manuel
  3            /usr/bin/startxfce4      50        mode manuel
  4            /usr/bin/xfce4-session   40        mode manuel


But since Buster, GDM3 launch GNOME as the default session ! We have to
specify manually Plasma on the first connexion.

Does the configuration in gdm3 has changed ? If so, could you please
tell me how to set up the default session in gdm3, so that Plasma is
launched for the first connexion instead of Gnome ?

Kind regards,

Adrien Grellier



--- System information. ---
Architecture:
Kernel: Linux 4.19.0-6-amd64

Debian Release: 10.1
500 stable-updates ftp.univ-nantes.fr
500 stable ftp.univ-nantes.fr
100 buster-backports ftp.univ-nantes.fr

--- Package information. ---
Depends (Version) | Installed
============================================-+-===============
accountsservice (>= 0.6.35) | 0.6.45-2
adduser | 3.118
dconf-cli (>= 0.20) | 0.30.1-2
dconf-gsettings-backend (>= 0.20) | 0.30.1-2
gir1.2-gdm-1.0 (= 3.30.2-3) | 3.30.2-3
gnome-session | 3.30.1-2
OR x-session-manager |
OR x-window-manager |
OR x-terminal-emulator |
gnome-session-bin (>= 3.10) | 3.30.1-2
gnome-settings-daemon (>= 3.24) | 3.30.2-3
gnome-shell (>= 3.19.92) | 3.30.2-9
gsettings-desktop-schemas | 3.28.1-1
libgdm1 (= 3.30.2-3) | 3.30.2-3
libglib2.0-bin (>= 2.35.0) | 2.58.3-2+deb10u1
libpam-modules (>= 0.72-1) | 1.3.1-5
libpam-runtime (>= 0.76-13.1) | 1.3.1-5
libpam-systemd | 241-7~deb10u1
librsvg2-common | 2.44.10-2.1
lsb-base (>= 3.2-14) | 10.2019051400
policykit-1 (>= 0.105-5~) | 0.105-25
procps | 2:3.3.15-2
ucf | 3.0038+nmu1
x11-common (>= 1:7.6+11) | 1:7.7+19
x11-xserver-utils | 7.7+8
debconf (>= 0.5) | 1.5.71
OR debconf-2.0 |
libaccountsservice0 (>= 0.6.37) | 0.6.45-2
libaudit1 (>= 1:2.2.1) | 1:2.8.4-3
libc6 (>= 2.14) |
libcanberra-gtk3-0 (>= 0.25) |
libcanberra0 (>= 0.2) |
libgdk-pixbuf2.0-0 (>= 2.22.0) |
libglib2.0-0 (>= 2.44.0) |
libgtk-3-0 (>= 3.0.0) |
libkeyutils1 (>= 1.5.9) |
libpam0g (>= 0.99.7.1) |
libselinux1 (>= 1.32) |
libsystemd0 |
libwrap0 (>= 7.6-4~) |
libx11-6 |
libxau6 |
libxcb1 |
libxdmcp6 |


Recommends (Version) | Installed
=============================-+-===========
at-spi2-core | 2.30.0-7
desktop-base (>= 6) | 10.0.2
x11-xkb-utils | 7.7+4
xserver-xephyr | 2:1.20.4-1
xserver-xorg | 1:7.7+19
zenity | 3.30.0-2


Suggests (Version) | Installed
=====================================-+-=============
gnome-orca |
libpam-fprintd (>= 0.8.0-2) |
libpam-gnome-keyring | 3.28.2-5

-- 

Adrien Grellier <adrien.grellier at ec-nantes.fr> (02 40 37 15 55)
Informaticien du LHEEA
CNRS – École Centrale de Nantes