I have the same problem. I installed lucid from a CD, keeping my /home installed on karmic on a different partition. As the reporter of this bug doesn't send the xorg logs, I send mine. These are the logs obtained after I had to manually reboot due to the crash.
** Attachment added: "xorg-logs.tar.gz" http://launchpadlibrarian.net/48217845/xorg-logs.tar.gz -- When multiple users login, GDM doesn't come back after any of them logs out leading to DATA LOSS for the others https://bugs.launchpad.net/bugs/569948 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs