https://bugs.freedesktop.org/show_bug.cgi?id=56405
--- Comment #20 from Alex Deucher agd5f@yahoo.com --- (In reply to comment #19)
Even if I would succeed in finding the bad commit how would you fix it if you can not reproduce the problem?
It will help narrow down what's causing the problem and give us a place to start looking. It may be a very simple fix. Without narrowing it down further, it's hard to even propose any fixes.