Chris, you are a magician! :) That's it. There has indeed been a lot of activity with the session monitor, which seems to be drive related - there has been an audio CD in the drive.
When I removed the CD (and put it back in!), the issue went away. I couldn't reproduce the bug again. The CD has to be in the drive when the system boots, and the bug occurs only once. -- System Monitor ignores close request and uses 100% of one core https://bugs.launchpad.net/bugs/441828 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is subscribed to gnome-system-monitor in ubuntu. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs