diff --git a/src/mainboard/system76/adl-p/devicetree.cb b/src/mainboard/system76/adl-p/devicetree.cb
index 6285851b68..6a9f362ac9 100644
--- a/src/mainboard/system76/adl-p/devicetree.cb
+++ b/src/mainboard/system76/adl-p/devicetree.cb
@@ -32,6 +32,8 @@ chip soc/intel/alderlake
 				[DDI_PORT_A] = DDI_ENABLE_HPD,
 				[DDI_PORT_B] = DDI_ENABLE_HPD | DDI_ENABLE_DDC,
 			}"
+
+			register "gfx" = "GMA_DEFAULT_PANEL(0)"
 		end
 		device ref tbt_pcie_rp0 on end
 		device ref shared_sram on end
diff --git a/src/mainboard/system76/gaze17/variants/3050/overridetree.cb b/src/mainboard/system76/gaze17/variants/3050/overridetree.cb
index dde358af2b..7a4a74d08e 100644
--- a/src/mainboard/system76/gaze17/variants/3050/overridetree.cb
+++ b/src/mainboard/system76/gaze17/variants/3050/overridetree.cb
@@ -9,6 +9,8 @@ chip soc/intel/alderlake
 				[DDI_PORT_A] = DDI_ENABLE_HPD,
 				[DDI_PORT_B] = DDI_ENABLE_HPD | DDI_ENABLE_DDC,
 			}"
+
+			register "gfx" = "GMA_DEFAULT_PANEL(0)"
 		end
 		device ref pcie4_0 on
 			# PCIe PEG0 x4, Clock 0 (SSD2)
diff --git a/src/mainboard/system76/gaze17/variants/3060/overridetree.cb b/src/mainboard/system76/gaze17/variants/3060/overridetree.cb
index 402a43ae03..6e00680bfe 100644
--- a/src/mainboard/system76/gaze17/variants/3060/overridetree.cb
+++ b/src/mainboard/system76/gaze17/variants/3060/overridetree.cb
@@ -6,6 +6,8 @@ chip soc/intel/alderlake
 			# DDIA is eDP
 			register "ddi_portA_config" = "1"
 			register "ddi_ports_config[DDI_PORT_A]" = "DDI_ENABLE_HPD"
+
+			register "gfx" = "GMA_DEFAULT_PANEL(0)"
 		end
 		device ref pcie4_0 on
 			# PCIe PEG0 x4, Clock 0 (SSD2)