Hi,
Same problem here (on a desktop box, no VM or container) after upgrading my
testing box. I got the "Oh no..." screen every time.
Installing xserver-xorg-legacy did not help, even when I allowed "anybody"
and forced "yes" for "needs_root_rights".
Downgrading gdm3 to 3.14.2 finally made the trick. I can even use the Xfce
systray applet to switch users without closing sessions. This survives reboots.
I noticed the following lines in my syslog file when gdm3 failed to start :
Nov 8 22:11:23 tarch gnome-session[2066]: Unable to init server: Impossible
de se connecter : Connexion refusée
Nov 8 22:11:23 tarch gnome-session[2066]: ** (gnome-session-failed:2318):
WARNING **: Impossible d'ouvrir l'affichage :
The last line roughly translates as "Cannot open display".
I kinda expected those problems when I read the News notice before to
upgrade, but:
- the News file says one should have logind and libpam-systemd but only the
latter is installed on my box while the former does not seems to be
available (aptitude search logind returns nothing); yet I have files related
to systemd-logind so I suppose this is what's needed,
- the News file says X now needs a kernel video driver but does not explain
how one can check if we got one - here my Xorg log file says X uses the
intel i965 driver but I don't know if it's a "kernel video driver"?
- the News file says X needs to run on the VT it was started from : will
such a feature allow running multiple user session concurrently (I mean
using a "switch user" feature?)
By the way, on the debian french users list someone worked around this
problem by adding the user Debian-gdm to the video group (see bug 799948 for
something similar) but this did not change anything on my box, I really had
to downgrade gdm3, which is quite annoying...
Tia for any solution that would permit upgrading to the standard version of
gdm3.
phep
