I had the same issue with 12.04 and nvidea drivers. I even downloaded the Gnome Live image to report it as upstream bug. I think there was a bug in gnome-screensaver. But now after installing 12.10 the bug disappeared.
-- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-power-manager in Ubuntu. https://bugs.launchpad.net/bugs/998735 Title: Light blue screen on primary monitor when waking up from inactivity To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/998735/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
