diff --git a/[refs] b/[refs]
index 101592873775..215ed6b7df44 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 27100ac95a8eee0b083e46bfa67b229ac641d28c
+refs/heads/master: dd62608bcc8a629c4c583fb50b90003fd5213516
diff --git a/trunk/drivers/gpu/drm/nouveau/nvd0_display.c b/trunk/drivers/gpu/drm/nouveau/nvd0_display.c
index 5e2b79bdcae0..421d301b3797 100644
--- a/trunk/drivers/gpu/drm/nouveau/nvd0_display.c
+++ b/trunk/drivers/gpu/drm/nouveau/nvd0_display.c
@@ -1661,7 +1661,9 @@ nvd0_display_unk2_handler(struct drm_device *dev, u32 crtc, u32 mask)
 	}
 
 	pclk = nv_rd32(dev, 0x660450 + (crtc * 0x300)) / 1000;
-	if (mask & 0x00010000) {
+	NV_DEBUG_KMS(dev, "PDISP: crtc %d pclk %d mask 0x%08x\n",
+			  crtc, pclk, mask);
+	if (pclk && (mask & 0x00010000)) {
 		nv50_crtc_set_clock(dev, crtc, pclk);
 	}