diff --git a/headers/private/graphics/intel_extreme/intel_extreme.h b/headers/private/graphics/intel_extreme/intel_extreme.h
index c5cb0169b6..e2ef215504 100644
--- a/headers/private/graphics/intel_extreme/intel_extreme.h
+++ b/headers/private/graphics/intel_extreme/intel_extreme.h
@@ -247,6 +247,10 @@ struct intel_free_graphics_memory {
 #define PCH_DISPLAY_A_PLL_DIVISOR_1		0xc6044	// INTEL_DISPLAY_A_PLL_DIVISOR_1
 #define PCH_DISPLAY_B_PLL_DIVISOR_0		0xc6048	// INTEL_DISPLAY_B_PLL_DIVISOR_0
 #define PCH_DISPLAY_B_PLL_DIVISOR_1		0xc604c	// INTEL_DISPLAY_B_PLL_DIVISOR_1
+#define PCH_PANEL_CONTROL				0xc7200	// INTEL_PANEL_CONTROL
+#define PCH_PANEL_STATUS				0xc7204	// INTEL_PANEL_STATUS
+
+#define PANEL_REGISTER_UNLOCK			(0xabcd << 16)
 
 // South Display Engine (SDE) Transcoder and Port Controls
 #define PCH_DISPLAY_A_ANALOG_PORT		0xe1100	// INTEL_DISPLAY_A_ANALOG_PORT
diff --git a/src/add-ons/accelerants/intel_extreme/dpms.cpp b/src/add-ons/accelerants/intel_extreme/dpms.cpp
index b45242a6c3..37fee355f6 100644
--- a/src/add-ons/accelerants/intel_extreme/dpms.cpp
+++ b/src/add-ons/accelerants/intel_extreme/dpms.cpp
@@ -74,26 +74,30 @@ enable_display_pipe(bool enable)
 static void
 enable_lvds_panel(bool enable)
 {
-	uint32 control = read32(INTEL_PANEL_CONTROL);
+	bool isSNB = gInfo->shared_info->device_type.InGroup(INTEL_TYPE_SNB);
+	int controlRegister = isSNB ? PCH_PANEL_CONTROL : INTEL_PANEL_CONTROL;
+	int statusRegister = isSNB ? PCH_PANEL_STATUS : INTEL_PANEL_STATUS;
+
+	uint32 control = read32(controlRegister);
 	uint32 panelStatus;
 
 	if (enable) {
 		if ((control & PANEL_CONTROL_POWER_TARGET_ON) == 0) {
-			write32(INTEL_PANEL_CONTROL, control
-				| PANEL_CONTROL_POWER_TARGET_ON);
+			write32(controlRegister, control | PANEL_CONTROL_POWER_TARGET_ON
+				| (isSNB ? PANEL_REGISTER_UNLOCK : 0));
 		}
 
 		do {
-			panelStatus = read32(INTEL_PANEL_STATUS);
+			panelStatus = read32(statusRegister);
 		} while ((panelStatus & PANEL_STATUS_POWER_ON) == 0);
 	} else {
 		if ((control & PANEL_CONTROL_POWER_TARGET_ON) != 0) {
-			write32(INTEL_PANEL_CONTROL, control
-				& ~PANEL_CONTROL_POWER_TARGET_ON);
+			write32(controlRegister, (control & ~PANEL_CONTROL_POWER_TARGET_ON)
+				| (isSNB ? PANEL_REGISTER_UNLOCK : 0));
 		}
 
 		do {
-			panelStatus = read32(INTEL_PANEL_STATUS);
+			panelStatus = read32(statusRegister);
 		} while ((panelStatus & PANEL_STATUS_POWER_ON) != 0);
 	}
 }