Just a note: One my other Gusty machine, one with a Intel Pentium 4 640 instead of the AMD Athlon 1100+ I posted above, it has the same problem. So if it helps, it doesn't look CPU related.
** Attachment added: "cpuinfo-p4.txt" http://launchpadlibrarian.net/8339703/cpuinfo-p4.txt -- gnome-system-monitor not displaying cpu% https://bugs.launchpad.net/bugs/124844 You received this bug notification because you are a member of Ubuntu Desktop Bugs, which is a bug contact for gnome-system-monitor in ubuntu. -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs
