Please see bug 123043, where I experienced something similar, but saw the default GNOME greeter instead of the standard Ubuntu one. Perhaps there's a clue here as to what is happening?
-- gdm spawns a new X server when told to restart the system https://bugs.launchpad.net/bugs/126797 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs