Correct, DPMS is the cause of it. If you don't want to disable DPMS for fear it may break something else, add this to your xorg.conf:
Section "ServerFlags" Option "blank time" "0" Option "standby time" "0" Option "suspend time" "0" Option "off time" "0" EndSection -- monitor goes to standby when playing a movie in totem fullscreen https://bugs.launchpad.net/bugs/30969 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is a direct subscriber. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs