https://bugs.freedesktop.org/show_bug.cgi?id=101290
--- Comment #2 from freedesktop@nuclearsunshine.com --- I've tried with a couple of "distro-friendly" bisection approaches so far but run into problems both times, probably partly due to the relative age of the kernels; I can try vanilla bisection but haven't looked into the details of that yet.
Is there anything else I can do that might help identify the problem in the interim, or is bisection the only option?