when i deinstall gnome-screensaver and replace it by xscreensaver, there is no problem. So i think it must be something with gnome-screensaver. When killing it, it also stops falling to standby. I run it in the lastest feisty and never experienced the problem before.
-- monitor goes to standby when playing a movie in totem fullscreen https://launchpad.net/bugs/30969 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs