I think this would be more of an issue with Beryl or the Nvidia drivers; most likely being Beryl. Try switching off Beryl temporarily. If the problem is fixed, it is a problem with Beryl. If it still does not appear, then it is a problem with the beta drivers.
** Changed in: gksu (Ubuntu) Assignee: (unassigned) => Jacob Peddicord Status: Unconfirmed => Needs Info -- when screen darkens, there is no password box https://launchpad.net/bugs/77429 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs