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?
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https://bugs.launchpad.net/bugs/1251065
Title:
HP Mini 1000 fails to resume from suspend
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