[Bug 95414] [SNA HSW] Corruption in OpenGL video output (DRI2 + TearFree)

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=95414

--- Comment #17 from Chris Wilson <chris at chris-wilson.co.uk> ---
New theory:

--- a/drivers/gpu/drm/i915/i915_gem_execbuffer.c
+++ b/drivers/gpu/drm/i915/i915_gem_execbuffer.c
@@ -1282,6 +1282,7 @@ void i915_vma_move_to_active(struct i915_vma *vma,

                /* update for the implicit flush after a batch */
                obj->base.write_domain &= ~I915_GEM_GPU_DOMAINS;
+               obj->cache_dirty |= obj->cache_level != I915_CACHE_NONE;
        }

        if (flags & EXEC_OBJECT_NEEDS_FENCE)

Can you please try
https://cgit.freedesktop.org/~ickle/linux-2.6/log/?h=prescheduler

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