I looked in /tmp and there is no socket with gdm in the name. I have attached syslog with debug turned on. I don't use either NFS or NIS.
** Attachment added: "syslog with debug" http://librarian.launchpad.net/4888840/syslog -- Cannot run gdmsetup https://launchpad.net/bugs/66034 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs