A system lock again and was able to ctrl alt F1 to a terminal and run ubuntu-bug xorg and ubuntu-bug gnome-screensaver - results attached
** Attachment added: "apport data for xorg" https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/782880/+attachment/2129294/+files/apport.xorg.4OV1Jo.apport -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/782880 Title: System hangs when screensaver active -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs