[Intel-gfx] xrandr crashes X with a "GPU hung" in the i915 driver

[Chris Wilson]

On Thu, 4 Nov 2010 17:12:31 -0700, Bryan Freed <bfreed at chromium.org> wrote:
> I have a situation where unplugging an external monitor and running an
> xrandr sequence to return the screen to the internal display sometimes
> causes the i915 driver to wig out.
> 
> In perusing the intel-gfx archives, I see
> http://lists.freedesktop.org/archives/intel-gfx/2010-May/006957.html makes a
> reference to "commit 9f54107f866a25cf670f81f7c52b8c108728c6a5", but I do not
> see that commit in the drm-intel kernel.  I am looking at git://
> git.kernel.org/pub/scm/linux/kernel/git/ickle/drm-intel.git.  Is this not
> the right repo?

That's in the DDX to fix up an X crash in swapbuffers. To debug GPU hangs
you'll want to decode /sys/kernel/debug/dri/0/i915_error_state.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre