GDM, gnome-session exits to login screen after a few seconds

view full story

https://bbs.archlinux.org – Recently, I've done a fresh installation of Arch Linux on my girlfriends laptop. She's using gnome and would like to log in graphically using GDM.However, when I try to login via gdm, I get kicked out of gnome after a couple of (say about 30) seconds back to the login screen. It doesn't seem to matter if I do something. Even with no input/programms/whatsoever, the session ends after a short time.The problem appears to be related to gdm, not gnome, though, because if I do not start GDM but launch my gnome-session via 'startx' from a terminal everything works perfectly f (HowTos)