diff -Naur linux-4.9~rc8/drivers/gpu/drm/i915/intel_bios.c linux-4.9~rc8-patched/drivers/gpu/drm/i915/intel_bios.c
--- linux-4.9~rc8/drivers/gpu/drm/i915/intel_bios.c     2016-12-04 21:50:51.000000000 +0100
+++ linux-4.9~rc8-patched/drivers/gpu/drm/i915/intel_bios.c     2016-12-07 13:39:00.247987113 +0100
@@ -218,19 +218,25 @@

        dev_priv->vbt.lvds_dither = lvds_options->pixel_dither;

-       ret = intel_opregion_get_panel_type(dev_priv);
-       if (ret >= 0) {
-               WARN_ON(ret > 0xf);
-               panel_type = ret;
-               DRM_DEBUG_KMS("Panel type: %d (OpRegion)\n", panel_type);
-       } else {
-               if (lvds_options->panel_type > 0xf) {
-                       DRM_DEBUG_KMS("Invalid VBT panel type 0x%x\n",
-                                     lvds_options->panel_type);
-                       return;
+       panel_type = i915.vbt_sdvo_panel_type;
+       if (panel_type == -2)
+               return;
+
+       if (panel_type < 0) {
+               ret = intel_opregion_get_panel_type(dev_priv);
+               if (ret >= 0) {
+                       WARN_ON(ret > 0xf);
+                       panel_type = ret;
+                       DRM_DEBUG_KMS("Panel type: %d (OpRegion)\n", panel_type);
+               } else {
+                       if (lvds_options->panel_type > 0xf) {
+                               DRM_DEBUG_KMS("Invalid VBT panel type 0x%x\n",
+                                             lvds_options->panel_type);
+                               return;
+                       }
+                       panel_type = lvds_options->panel_type;
+                       DRM_DEBUG_KMS("Panel type: %d (VBT)\n", panel_type);
                }
-               panel_type = lvds_options->panel_type;
-               DRM_DEBUG_KMS("Panel type: %d (VBT)\n", panel_type);
        }

        dev_priv->vbt.panel_type = panel_type;