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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [945GM bisected] screen blank on S3 resume on"
href="https://bugs.freedesktop.org/show_bug.cgi?id=72782#c13">Comment # 13</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW --- - [945GM bisected] screen blank on S3 resume on"
href="https://bugs.freedesktop.org/show_bug.cgi?id=72782">bug 72782</a>
from <span class="vcard"><a class="email" href="mailto:chris@chris-wilson.co.uk" title="Chris Wilson <chris@chris-wilson.co.uk>"> <span class="fn">Chris Wilson</span></a>
</span></b>
<pre>Out of curiosity more than anything else, can you try
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 27300d6b583b..eb2fa4b89219 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -5548,6 +5548,8 @@ static void gen3_init_clock_gating(struct drm_device
*dev)
if (IS_PINEVIEW(dev))
I915_WRITE(ECOSKPD, _MASKED_BIT_ENABLE(ECO_GATING_CX_ONLY));
+ I915_WRITE(DSPCLK_GATE_D, I915_READ(DSPCLK_GATE_D) |
DPLUNIT_CLOCK_GATE_DISABLE);
+
/* IIR "flip pending" means done if this bit is set */
I915_WRITE(ECOSKPD, _MASKED_BIT_DISABLE(ECO_FLIP_DONE));
}
and see if that cures the random lines?</pre>
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