https://bugs.freedesktop.org/show_bug.cgi?id=78788
--- Comment #4 from Iaroslav Andrusyak pontostroy@gmail.com --- Mesa-git git-54a84d9 http://cgit.freedesktop.org/~agd5f/linux/log/?h=drm-next-3.17-wip New firmware
Same problem, slow 3d after using VCE