Index: /trunk/src/VBox/Main/src-client/BusAssignmentManager.cpp
===================================================================
--- /trunk/src/VBox/Main/src-client/BusAssignmentManager.cpp	(revision 79673)
+++ /trunk/src/VBox/Main/src-client/BusAssignmentManager.cpp	(revision 79674)
@@ -80,5 +80,10 @@
 
     /* ACPI controller */
+#if 0
+    // It really should be this for 440FX chipset (part of PIIX4 actually)
+    {"acpi",          0,  1,  3, 0},
+#else
     {"acpi",          0,  7,  0, 0},
+#endif
 
     /* Network controllers */