Bug#771762: [DEPEND] Dependency failed for X11 Display Manager.

[Bryan Ritter]

Package: gdm3
Version: 3.14.1-3

Package: kdm
Version: 4:4.11.13-2

I have both GNOME and KDE desktops installed.
My system was/is set to startup with the kdm login screen.

After upgrading from Debian Stable(Wheezy) to Debian Testing(Jessie)*,
There are several 'starting GNOME Display Manager' errors shown.

During login I see at around 4 times:
starting GNOME Display Manager...
[FAILED] failed to start GNOME Display Manager.
See 'systemctl status gdm.service' for details.
[DEPEND] Dependency failed for X11 Display Manager.

Then the KDE login display shows up fine, and I can log in.

*via /etc/apt/sources.list by changing 'Stable'/'Wheezy' to 'Jessie', `sudo apt-get
update`, `sudo apt-get --download-only dist-upgrade`, `sudo apt-get
dist-upgrade`, ...

---

`systemctl status gdm.service`
● gdm.service - GNOME Display Manager
   Loaded: loaded (/lib/systemd/system/gdm.service; static)
  Drop-In: /run/systemd/generator/gdm3.service.d
           └─50-gdm3-$x-display-manager.conf
   Active: failed (Result: start-limit) since Mon 2014-12-01 22:26:41 EST; 42min ago

`systemctl status kdm.service`
● kdm.service - LSB: X display manager for KDE
   Loaded: loaded (/etc/init.d/kdm)
  Drop-In: /run/systemd/generator/kdm.service.d
           └─50-kdm-$x-display-manager.conf
   Active: active (running) since Mon 2014-12-01 22:26:52 EST; 44min ago
   CGroup: /system.slice/kdm.service
           ├─1684 /usr/bin/kdm
           └─1691 /usr/bin/X :0 vt7 -br -nolisten tcp -auth
/var/run/xauth/A:0-8CJLmb

---

`sudo updatedb`
`locate kdm.service`
/usr/share/dbus-1/system-services/org.kde.kcontrol.kcmkdm.service
`locate gdm3.service`
/lib/systemd/system/gdm3.service

---

`uname -a`
Linux bryan-laptop 3.16.0-4-amd64 #1 SMP Debian 3.16.7-2 (2014-11-06) x86_64
GNU/Linux

--- gdm3 to gdm3 ---

`sudo dpkg-reconfigure gdm3`
Job for gdm.service failed. See 'systemctl status gdm.service' and 'journalctl
-xn' for details.
invoke-rc.d: initscript gdm3, action "reload" failed.

`sudo dpkg-reconfigure kdm`
insserv: warning: script 'lprng' missing LSB tags and overrides
insserv: warning: script 'cupsys' missing LSB tags and overrides
insserv: warning: script 'lpd' missing LSB tags and overrides


--- kdm to kdm ---

`sudo dpkg-reconfigure gdm3`
WARNING: /lib/systemd/system/kdm.service is the selected default display manager
but does not exist
Job for gdm.service failed. See 'systemctl status gdm.service' and 'journalctl
-xn' for details.
invoke-rc.d: initscript gdm3, action "reload" failed.

`sudo dpkg-reconfigure kdm`
insserv: warning: script 'lprng' missing LSB tags and overrides
insserv: warning: script 'cupsys' missing LSB tags and overrides
insserv: warning: script 'lpd' missing LSB tags and overrides

--- Switching logins with `sudo dpkg-reconfigure gdm3` ---

kdm to gdm3

`sudo dpkg-reconfigure gdm3`
Job for gdm.service failed. See 'systemctl status gdm.service' and 'journalctl
-xn' for details.
invoke-rc.d: initscript gdm3, action "reload" failed.

gdm3 to kdm

`sudo dpkg-reconfigure gdm3`
Please be sure to run "dpkg --configure kdm".
WARNING: /lib/systemd/system/kdm.service is the selected default display manager
but does not exist
Job for gdm.service failed. See 'systemctl status gdm.service' and 'journalctl
-xn' for details.
invoke-rc.d: initscript gdm3, action "reload" failed.

--- Switching logins with `sudo dpkg-reconfigure kdm` ---

kdm to gdm3

`sudo dpkg-reconfigure kdm`
insserv: warning: script 'lprng' missing LSB tags and overrides
insserv: warning: script 'cupsys' missing LSB tags and overrides
insserv: warning: script 'lpd' missing LSB tags and overrides

gdm3 to kdm

`sudo dpkg-reconfigure kdm`
insserv: warning: script 'lprng' missing LSB tags and overrides
insserv: warning: script 'cupsys' missing LSB tags and overrides
insserv: warning: script 'lpd' missing LSB tags and overrides

---

`journalctl -xn`
No journal files were found.

---

`sudo dpkg-reconfigure desktop-base`
...
Job for gdm.service failed. See 'systemctl status gdm.service' and 'journalctl
-xn' for details.
invoke-rc.d: initscript gdm3, action "reload" failed.