Comment 66 for bug 264769

I think adding sisfb to /etc/modules did it.

I didn't spend too much time on the laptop today, but I was on just long enough to upgrade it from intrepid to jaunty and still saw the video artifacts.

After rebooting with sisfb added, video looks much better. I'll do further testing as time allows, and report back... but for right now it looks like it might be a possible fix.