Created attachment 74766 [details] [review] Test to check if it's async dma Please test with this mesa patch (either against mesa 9.1git or mesa master git). If it fix the issue then please test making sure you a have kernel with this kernel patch : http://cgit.freedesktop.org/~airlied/linux/commit/?h=drm-fixes&id=de0babd60d8d43b58fd06a7803151d32cb589af0