As I mentioned in comment 10, I (for no apparent reason) no have this problem. Sorry that I cannot be of some help.
-- Cannot Unlock "System > Administration > Login Screen" https://bugs.launchpad.net/bugs/431147 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs