diff --git a/src/add-ons/accelerants/intel_extreme/Ports.cpp b/src/add-ons/accelerants/intel_extreme/Ports.cpp
index d6140106e5..53913ee582 100644
--- a/src/add-ons/accelerants/intel_extreme/Ports.cpp
+++ b/src/add-ons/accelerants/intel_extreme/Ports.cpp
@@ -252,7 +252,9 @@ AnalogPort::SetDisplayMode(display_mode* target, uint32 colorMode)
 			pll |= DISPLAY_PLL_POST1_DIVIDE_2;
 	}
 
-	write32(INTEL_DISPLAY_A_PLL, pll);
+	// Programmer's Ref says we must allow the DPLL to "warm up" before starting the plane
+	// so mask its bit, wait, enable its bit
+	write32(INTEL_DISPLAY_A_PLL, pll & ~DISPLAY_PLL_NO_VGA_CONTROL);
 	read32(INTEL_DISPLAY_A_PLL);
 	spin(150);
 	write32(INTEL_DISPLAY_A_PLL, pll);