This sounds like a duplicate of existing similar bug reports. To confirm this, please try waking the machine from sleep but not entering your password. Does the display become obscured a short time after waking still?
** Changed in: gnome-shell (Ubuntu) Status: New => Incomplete ** Changed in: gnome-shell (Ubuntu) Importance: Undecided => High -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1735550 Title: Privacy: One screen not covered on wake after sleep To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1735550/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs