thank you for your bug report, that seems a video driver issue rather than a gdm bug
** Package changed: gdm (Ubuntu) => xorg-server (Ubuntu) -- VDU Display fails just before login screen https://bugs.launchpad.net/bugs/619994 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