A further comment: I noticed this bug report here which seems to report a similar issue https://bugs.launchpad.net/compiz/+bug/1293384
I also figured out that even moving the mouse around causes high CPU usage. For example, launch Nautilus and move the mouse around inside it for 15-20 seconds or so. My CPU usage jumps to 25% for Xorg, 25% for nautilus, and 15% for compiz. Same thing happens with other programs like Firefox. So I searched around some more and found this bug report: https://bugs.launchpad.net/xorg-server/+bug/1250277 It seems that there's a chance all of these bug reports might be related. I will test on my office PC soon, which has an nvidia card, and report back. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1337749 Title: High CPU usage after resizing a window To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1337749/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp
