As suggested by @albertomilone, I have filed a new bug report: https://bugs.launchpad.net/ubuntu/+source/xorg/+bug/1011698 . If you are still encountering performance problems, please vote for the bug there. It sounds as if there are multiple problems that need sorting out.
As suggested by @albertomilone, I have filed a new bug report: https:/ /bugs.launchpad .net/ubuntu/ +source/ xorg/+bug/ 1011698 . If you are still encountering performance problems, please vote for the bug there. It sounds as if there are multiple problems that need sorting out.