Comment 39 for bug 136529

Thanks for the hint. But unfortunately this doesn't work for me either. I did like you told me and removed the gdm autostart links with "update-rc.d -f gdm remove". Then I created a .xinitrc file with "exec gnome-session" in it and rebooted my machine. After logging in via terminal I then executed the "startx" script and my machine stops at exactly the same point as before - only that now I don't see the brown Ubuntu background but the grey background of the X server (along with its mouse pointer). I then switched back to the console and listed all running processes and it seems that gnome-session, gnome-settings-manager, metacity, pulseaudio, etc. have actually been started. But at some unknown point the system still just stops loading my GNOME session.
So it seems that this has actually nothing to do with gdm - after booting the old 2.6.22 kernel again it works fine (that's how I'm writing here).
What am I supposed to do now? Any suggestions? I'm thinking about opening a new bugreport now, but I don't know wether this is a good idea or not.