[Bug 78547] GPU hang (EIR stuck) when trying to launch XBMC

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=78547

--- Comment #17 from Chris Wilson <chris at chris-wilson.co.uk> ---
It has the same symptoms that the ringbuffer has been overwritten.

I would try:

ickle at nuc-i3427:/usr/src/linux$ git diff
diff --git a/drivers/gpu/drm/i915/i915_gem_stolen.c
b/drivers/gpu/drm/i915/i915_gem_stolen.c
index 20bd839..dcf90ca 100644
--- a/drivers/gpu/drm/i915/i915_gem_stolen.c
+++ b/drivers/gpu/drm/i915/i915_gem_stolen.c
@@ -337,6 +337,8 @@ int i915_gem_init_stolen(struct drm_device *dev)
        }
 #endif

+       dev_priv->gtt.stolen_size = 0;
+
        if (dev_priv->gtt.stolen_size == 0)
                return 0;

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