diff --git a/drivers/gpu/drm/nouveau/nv04_dac.c b/drivers/gpu/drm/nouveau/nv04_dac.c
index 1cb19e3..3998554 100644
--- a/drivers/gpu/drm/nouveau/nv04_dac.c
+++ b/drivers/gpu/drm/nouveau/nv04_dac.c
@@ -239,6 +239,10 @@ uint32_t nv17_dac_sample_load(struct drm_encoder *encoder)
 			testval = dev_priv->vbios.dactestval;
 	}
 
+	nv_wr32(dev, 0x00680614, 0x1f232323);
+	nv_wr32(dev, 0x00001084, 0x00205749);
+	nv_wr32(dev, 0x00001588, 0x00800000);
+
 	saved_rtest_ctrl = NVReadRAMDAC(dev, 0, NV_PRAMDAC_TEST_CONTROL + regoffset);
 	NVWriteRAMDAC(dev, 0, NV_PRAMDAC_TEST_CONTROL + regoffset,
 		      saved_rtest_ctrl & ~NV_PRAMDAC_TEST_CONTROL_PWRDWN_DAC_OFF);
@@ -277,6 +281,9 @@ uint32_t nv17_dac_sample_load(struct drm_encoder *encoder)
 			routput &= ~(0x1a << 16);
 	}
 
+	nv_wr32(dev, 0x00682614, 0x1fbfbfbf);
+	nv_wr32(dev, 0x00682628, 0x00004013);
+
 	NVWriteRAMDAC(dev, 0, NV_PRAMDAC_DACCLK + regoffset, routput);
 	msleep(1);