Index: linux-2.6.33-rc8-git4/drivers/gpu/drm/i915/i915_suspend.c
===================================================================
--- linux-2.6.33-rc8-git4.orig/drivers/gpu/drm/i915/i915_suspend.c	2010-05-27 18:23:12.009413646 +0900
+++ linux-2.6.33-rc8-git4/drivers/gpu/drm/i915/i915_suspend.c	2010-05-27 18:26:38.711063522 +0900
@@ -564,6 +564,8 @@
 		dev_priv->savePP_CONTROL = I915_READ(PP_CONTROL);
 		dev_priv->savePFIT_PGM_RATIOS = I915_READ(PFIT_PGM_RATIOS);
 		dev_priv->saveBLC_PWM_CTL = I915_READ(BLC_PWM_CTL);
+		printk(KERN_INFO "i915_save_display(): BLC_PWM_CTL:%08x\n",
+		       dev_priv->saveBLC_PWM_CTL);
 		dev_priv->saveBLC_HIST_CTL = I915_READ(BLC_HIST_CTL);
 		if (IS_I965G(dev))
 			dev_priv->saveBLC_PWM_CTL2 = I915_READ(BLC_PWM_CTL2);
@@ -684,7 +686,11 @@
 		I915_WRITE(PCH_PP_CONTROL, dev_priv->savePP_CONTROL);
 	} else {
 		I915_WRITE(PFIT_PGM_RATIOS, dev_priv->savePFIT_PGM_RATIOS);
+		printk(KERN_INFO "i915_restore_display(): BLC_PWM_CTL=%08x\n",
+		       dev_priv->saveBLC_PWM_CTL);
 		I915_WRITE(BLC_PWM_CTL, dev_priv->saveBLC_PWM_CTL);
+		printk(KERN_INFO "i915_restore_display(): BLC_PWM_CTL:%08x\n",
+		       I915_READ(BLC_PWM_CTL));
 		I915_WRITE(BLC_HIST_CTL, dev_priv->saveBLC_HIST_CTL);
 		I915_WRITE(PP_CONTROL, I915_READ(PP_CONTROL) | (0xABCD << 16));
 		I915_WRITE(PP_ON_DELAYS, dev_priv->savePP_ON_DELAYS);