https://bugs.freedesktop.org/show_bug.cgi?id=73528
--- Comment #17 from Michel Dänzer michel@daenzer.net --- The situation hasn't changed since comment #13:
At this point, there's no way to make progress on this bug without someone who can reproduce the problem and investigate or at least bisect it. It's up to you if you want to look for someone else who fits the bill, or just bisect yourself.