I can reproduce this problem by logging out and logging in with the external screen attached. Compiz chokes the computer running at around 150% CPU usage alone. If I unplug the external screen the laptop seems to get largely back to normal. Then plugging the screen back in - the situation is as I previously noted, compiz usage is high but not so bad. Rebooting or logging out then back in triggers the very high compiz usage.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1361911 Title: I have recently rebooted after the latest software update and suddenly my laptop is running slower than slow. top shows compliz is taking between 20% to more often 130% or more of the CPU (dual CPU). My system was running really well now it is very very slow. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/unity/+bug/1361911/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
