i've found a temporary solution that seems to work ok on my system, go to System/Administration/Services and uncheck the box for powernowd this will disable cpu scaling, but it fixes not restarting the issue.
-- [edgy] Restart takes much too long https://launchpad.net/bugs/66589 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
