i had vm.swappiness=0. I set the value to 10 and the problem no longer occurs. don't know why, but it fixed it.
** Changed in: xorg (Ubuntu) Status: New => Fix Released -- [Gutsy] Xorg CPU usage during video playback https://bugs.launchpad.net/bugs/151704 You received this bug notification because you are a member of Ubuntu Bugs, which is the bug contact for Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs