I have the same issue. I can fix it by changing terminals (alt-ctrl-F1) and pkill gnome-screensaver
back on my gnome session (ctrl-alt-f7) I'm back on my desktop -- 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/781697 Title: screen saver system freeze after some time -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs