Seems rather an xorg issue. Do you get the same issue if you use dpms to turn off the screen? Could you add your Xorg.0.log after getting the issue?
** Package changed: gnome-screensaver (Ubuntu) => xorg-server (Ubuntu) ** Changed in: xorg-server (Ubuntu) Importance: Undecided => Low -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/844193 Title: Screen won't turn back on after being turned off due to inactivity (System Settings -> Screen) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg-server/+bug/844193/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
