On Sun, Nov 03, 2013 at 04:15:18PM +0100, Bas Wijnen wrote:
> Hi Chris,
> 
> I got a black screen while using your patch.
> /sys/kernel/debug/dri/0/i915_gem_objects contents are shown below.  The first
> time is while the video is running; the second after stopping it.  AFAICS,
> there is no difference between them.

Indeed, that scuppers my theory about it being an allocation failure to
GEM space exhaustion. I am not sure what else to suggest to explain why
it spontaneously fails to allocate that BO. You could try drm.debug=7,
but searching for the failure would be like hunting for a needle in a
haystack - and I'm not sure if we give any information as to how it
fails, nor does libdrm_intel have any such debug. You can try disabling
the uxa BO cache with Option "BufferCache" "false" and seeing if that
makes any difference.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre


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