On Thu, 24 May 2012 16:15:41 +0200, Zdenek Kabelac <zdenek.kabelac at gmail.com> wrote: > Hi > > Since I've started to use SNA driver (when UXA appeared to be very > slow), I'm facing higher number of Xorg crashes. > SNA is faster, but less stable then UXA is. They are all debugging assertions caused by the earlier GPU hang, to catch instances were we are losing commands and thus potentially corrupting the output due to the loss of the GPU. Tip, don't hang the GPU or don't ask for the bt. -Chris -- Chris Wilson, Intel Open Source Technology Centre