https://bugs.freedesktop.org/show_bug.cgi?id=92269
--- Comment #7 from Krzysztof A. Sobiecki sobkas@gmail.com --- (In reply to Daniel Scharrer from comment #6)
Then this might be a duplicate of bug #92122.
There is a patch series on the ML waiting for review: http://patchwork.freedesktop.org/patch/61011/ http://patchwork.freedesktop.org/patch/61012/
I'm going to bisect it on my end anyway, it's fast enough so it shouldn't be a problem.