At my wit's end here! I can't get gdm to run. Not just not at boot-time, but at all. There's no error message. tty7 stays blank. It doesn't seem to attempt to start an X server. It doesn't log anything in /var/log/gdm or /var/log/Xorg.0.log (anywhere else I should look?).
$ sudo start gdm gdm start/running, process 17747 $ sudo start gdm gdm start/running, process 17769 $ sudo start gdm gdm start/running, process 17791 $ sudo stop gdm stop: Unknown instance:
I've purged gdm, installed gdm, reinstalled gdm with -f and -m for good measure, wiped /usr/share/gdm, /etc/gdm, /etc/dconf/db/gdm.d and even ~/.config/dconf/user... nothing! Upgrading to 14.10 didn't help, either.
Running the gdm binary itself starts up some sort of miniature Gnome-Shell with nothing to do.
Gnome-Shell itself works fine with lightdm... minus the screen lock functionality, which I want. Besides, it just bothers me that something doesn't work. :þ
I'm having this issue on a regular desktop as well as an Eee PC 1215 N with intel/nvidia hybrid graphics. Both have KDE in addition to Gnome-Shell. (Well, I reinstalled the Eee PC with elementary OS yesterday).
Update: sudo start gdm says "gdm start/running" and provides a pid even with the gdm binary itself removed.