removing NeedInfo, CPU usage questions were answered. I already read recommendations of enabling EXA in xorg.conf but for me it didn't seem to help (but I tested it quickly).
** Changed in: xorg (Ubuntu) Status: Needs Info => Confirmed -- Very hi CPU usage when refreshing a window. radeon driver https://launchpad.net/bugs/73473 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs