I think I know what's going on. I managed to turn on gnome-screensaver debugging on login (I had to rename /usr/bin/gnome-screensaver and replace it with a script that launches gnome-screensaver with debugging enabled.
Comparing the debug output from when the screensaver worked to when it doesn't I noticed that when the screensaver wasn't working the output contained lines like: [listener_add_ref_entry] gs-listener-dbus.c:723 (13:48:37): adding throttler from Power screensaver for reason 'On battery power' on connection :1.6 and [manager_maybe_start_job_for_window] gs-manager.c:215 (13:48:53): Not starting job because throttled There is no mention of throttling in the debug output when the screensaver does work correctly. So it seems that gnome-screensaver is only blanking the screen because it thinks the machine is running on battery power (it's not - i'm running on AC). I tried pulling out the power cable and plugging it back in, after which the screensaver was worked correctly. This would seem to indicate that the problem is not with gnome- screensaver but somewhere else. Perhaps in gnome-power-manager. -- screensaver starts but shows only a black screen https://bugs.launchpad.net/bugs/60394 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is a bug assignee. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
