I don't know if this is related: I suffer from the same symptoms with the nouvau driver in Oneiric. The workaround [1] described in bug #779753 (comment #18) seems to fix the problem for me.
[1] http://souriguha.wordpress.com/2011/03/08/how-to-solve-problem-with- thinkpadkslowd-kworker-on-linux-kernel-2-35-2-36/ -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/746084 Title: [i945gm] Stuttering mouse with Natty Narwhal To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/746084/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs