This seems like an issue with the lock screen. If it happens again, then can you post a screenshot of the issue? That would be very helpful, thanks!
** Also affects: gnome-screensaver (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-nouveau in Ubuntu. https://bugs.launchpad.net/bugs/1016854 Title: Desktop appearance changes after locking desktop for few minutes To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/1016854/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp