https://bugzilla.kernel.org/show_bug.cgi?id=113861
--- Comment #7 from Alex Deucher alexdeucher@gmail.com --- Probably the same issue as reported here: https://lists.freedesktop.org/archives/dri-devel/2016-March/102379.html Does reverting dbb17a21c131eca94eb31136eee9a7fe5aff00d9 fix it?