I was also seeing this issue, Kubuntu 12.10 64bit. I changed the screen saver timer settings in System Settings, to 1 minute to test it, and the issue disappeared...
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/944062 Title: display power management utilities turn screen off after 10 minutes even when VLC is playing video To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/vlc/+bug/944062/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs