I never had this issue so far. And, it seems more of a gnome-screensaver issue than a Unity issue.
** Changed in: unity Status: New => Invalid -- You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-screensaver in Ubuntu. https://bugs.launchpad.net/bugs/901823 Title: Window/tray bar appears in lock screen after running system for a while without shutdown To manage notifications about this bug go to: https://bugs.launchpad.net/unity/+bug/901823/+subscriptions -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs