It sounds like this could be a dupe of 441638. The thing to check is if gdm is continually restarting (look in /var/log/gdm/ to see if you have a bunch of log files all with the same date and time.) If so, then it's a dupe.
-- Cannot start gdm after upgrade from Jaunty https://bugs.launchpad.net/bugs/450731 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gdm in ubuntu. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs