the problem is in gdm package. /etc/gdm/custom.conf file is corrupt. Fixing /etc/gdm/custom.conf file, fixes this bug.
** Package changed: ubiquity (Ubuntu) => gdm (Ubuntu) ** Package changed: gdm (Ubuntu) => ubiquity (Ubuntu) -- lucid Live CD boots to login screen https://bugs.launchpad.net/bugs/500250 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