Collect the output of `ps aux > ps.txt` and post that here, from when the system is showing the performance problem.
Nothing is out of the ordinary in your log files, and this does not sound like an X bug so far to me. Do you have other information or reasons why you believe it to be a problem with X? ** Changed in: xorg (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/916763 Title: Ubuntu sometimes stutters in that the mouse will briefly stop moving, sometimes the screen will lock up completely. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/916763/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs