Index: /trunk/src/VBox/Devices/Graphics/DevVGA.cpp
===================================================================
--- /trunk/src/VBox/Devices/Graphics/DevVGA.cpp	(revision 30885)
+++ /trunk/src/VBox/Devices/Graphics/DevVGA.cpp	(revision 30886)
@@ -2524,5 +2524,8 @@
 
             /* Do a complete redraw, which will pick up a new screen resolution. */
-            if (s->gr[6] & 1) {
+            if (fBlank) {
+                s->graphic_mode = GMODE_BLANK;
+                vga_draw_blank(s, 1);
+            } else if (s->gr[6] & 1) {
                 s->graphic_mode = GMODE_GRAPH;
                 rc = vga_draw_graphic(s, 1);