seems that your install is broken, you should try to reinstall the gdm package and see if that make it work better
-- GDM crashes if you try change the login window. https://bugs.launchpad.net/bugs/208073 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
