This is Edgy with all updates. The xsession-errors shows some regular looking startup messages, then a few alsa errors about not being able to find a device, then it just seems like the server died.
ALSA lib pcm.c:2146:(snd_pcm_open_noupdate) Unknown PCM default The application 'gnome-session' lost its connection to the display :20.0; most likely the X server was shut down or you killed/destroyed the application. -- login in nested window dies changing workspace https://launchpad.net/bugs/73931 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs