Bug#767388: gdm3: (with default=kdm) gdm.service gives failed status

[Tsu Jan]

I have systemd 215-8 (which is now in Testing) and have the same problem 
but with gdm3 and lightdm. Here, both lightdm (1.10.3-3) and gdm3 
(3.14.1-3) are installed but the former is set to be the default display 
manager. I get lines like these:


gdm.service: control process exited, code=exited status=1

Failed to start GNOME Display Manager.

Dependency failed for X11 Display Manager.

Unit gdm.service entered failed state.


They seem harmless and I can uninstall gdm3 to get rid of them but this 
is definitely a bug. It seems that systemd has a bias toward gdm and 
sees it indispensable even when it isn't the default DM.