I can confirm that killing gnome-screensaver is a workaround. Could this be related to bug 411350 (gnome-screensaver does not activate)? I have that issue as well.
https://bugs.launchpad.net/ubuntu/+source/gnome-screensaver/+bug/411350
I can confirm that killing gnome-screensaver is a workaround. Could this be related to bug 411350 (gnome-screensaver does not activate)? I have that issue as well.
https:/ /bugs.launchpad .net/ubuntu/ +source/ gnome-screensav er/+bug/ 411350