[Bug 101269] [SNB] gpu hangs

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101269

--- Comment #23 from Simon <sur3 at gmx.de> ---
I uncommented the if in intel_atomic_wait_for_vblanks, for the function to
always return instead of waiting, that seems to fix my problem with no negative
side effect: 

static void intel_atomic_wait_for_vblanks(struct drm_device *dev,
                                          struct drm_i915_private *dev_priv,
                                          unsigned crtc_mask)
{
        unsigned last_vblank_count[I915_MAX_PIPES];
        enum pipe pipe;
        int ret;

        //if (!crtc_mask)
                return;

       //...
}

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