(In reply to Maximilian Böhm from comment #179)
> Just want to remind you that there is a Mesa connection somehow.

I've seen that mentioned before, but the answer is always the same: Please
bisect Mesa.

(In reply to agapito from comment #180)
> I know it's early to say this but 3.18 rc2 solved this bug for me.

Can you bisect which commit in 3.18-rc2 fixed it for you?