diff --git a/src/mainboard/lenovo/t420/devicetree.cb b/src/mainboard/lenovo/t420/devicetree.cb
index eaae94c..5ac9cf5 100644
--- a/src/mainboard/lenovo/t420/devicetree.cb
+++ b/src/mainboard/lenovo/t420/devicetree.cb
@@ -1,7 +1,6 @@
 chip northbridge/intel/sandybridge
 	# IGD Displays
-	register "gfx.ndid" = "3"
-	register "gfx.did" = "{ 0x80000100, 0x80000240, 0x80000410, 0x80000410, 0x00000005 }"
+	register "gfx" = "GMA_STATIC_DISPLAYS(1)"
 
 	# Enable DisplayPort Hotplug with 6ms pulse
 	register "gpu_dp_d_hotplug" = "0x06"
@@ -13,7 +12,6 @@
 	register "gpu_panel_power_down_delay" = "300"		# T5+T6: 30ms
 	register "gpu_panel_power_backlight_on_delay" = "2000"	# T3: 200ms
 	register "gpu_panel_power_backlight_off_delay" = "2000"	# T4: 200ms
-	register "gfx.use_spread_spectrum_clock" = "1"
 	register "gpu_cpu_backlight" = "0x1155"
 	register "gpu_pch_backlight" = "0x06100610"