https://bugs.freedesktop.org/show_bug.cgi?id=43405
--- Comment #4 from idunham@lavabit.com 2011-12-01 15:36:03 PST --- I've updated the kernel since, but I know the old version is good because I still have the binaries. I'd switched to fglrx due to thermal reasons (a mix of dust, weather, and bad power management in the driver). I did not update any other relevant components.
I've gotten a few good results. It looks like it was one of the Evergreen support fixes that broke it; the first one works, and I've got about 2 revisions left to go.