I believe this is a problem that roots in unity, compiz and xorg working together. ANY application that continously updates the screen causes compiz AND xorg cpu usage to go up. Examples that trigger the problem include HTML5-animated-websites, moving around terminal windows with the mouse, the spectrum analyzer in audacious, and flash animations/videos.
On my machine (Thinkpad t430 with Intel i7 3520M and Intel HD 4000 graphics) the cpu usage in Precise was already much too high: After a fresh boot open two terminals, start top in the one and keep moving around the other one. Xorg and compiz together use 10-20% cpu. In Quantal the same experiment results in 20-40% cpu usage. For nothing but moving a small window around. -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg-server in Ubuntu. https://bugs.launchpad.net/bugs/1064329 Title: High CPU load (above 50%) on Xorg process when browsing low graphic intensive sites To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/chromium-browser/+bug/1064329/+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
