Index: grub-2.04~rc1/grub-core/kern/ieee1275/cmain.c
===================================================================
--- grub-2.04~rc1.orig/grub-core/kern/ieee1275/cmain.c
+++ grub-2.04~rc1/grub-core/kern/ieee1275/cmain.c
@@ -90,7 +90,10 @@ grub_ieee1275_find_options (void)
   }
 
   if (rc >= 0 && grub_strncmp (tmp, "IBM", 3) == 0)
-    grub_ieee1275_set_flag (GRUB_IEEE1275_FLAG_NO_TREE_SCANNING_FOR_DISKS);
+    {
+        grub_ieee1275_set_flag (GRUB_IEEE1275_FLAG_NO_TREE_SCANNING_FOR_DISKS);
+        grub_ieee1275_set_flag (GRUB_IEEE1275_FLAG_DISABLE_VIDEO_SUPPORT);
+    }
 
   /* Old Macs have no key repeat, newer ones have fully working one.
      The ones inbetween when repeated key generates an escaoe sequence
Index: grub-2.04~rc1/grub-core/video/ieee1275.c
===================================================================
--- grub-2.04~rc1.orig/grub-core/video/ieee1275.c
+++ grub-2.04~rc1/grub-core/video/ieee1275.c
@@ -352,9 +352,12 @@ static struct grub_video_adapter grub_vi
 
 GRUB_MOD_INIT(ieee1275_fb)
 {
-  find_display ();
-  if (display)
-    grub_video_register (&grub_video_ieee1275_adapter);
+  if (! grub_ieee1275_test_flag (GRUB_IEEE1275_FLAG_DISABLE_VIDEO_SUPPORT))
+    {
+      find_display ();
+      if (display)
+        grub_video_register (&grub_video_ieee1275_adapter);
+    }
 }
 
 GRUB_MOD_FINI(ieee1275_fb)
Index: grub-2.04~rc1/include/grub/ieee1275/ieee1275.h
===================================================================
--- grub-2.04~rc1.orig/include/grub/ieee1275/ieee1275.h
+++ grub-2.04~rc1/include/grub/ieee1275/ieee1275.h
@@ -148,6 +148,8 @@ enum grub_ieee1275_flag
   GRUB_IEEE1275_FLAG_CURSORONOFF_ANSI_BROKEN,
 
   GRUB_IEEE1275_FLAG_RAW_DEVNAMES,
+
+  GRUB_IEEE1275_FLAG_DISABLE_VIDEO_SUPPORT
 };
 
 extern int EXPORT_FUNC(grub_ieee1275_test_flag) (enum grub_ieee1275_flag flag);