Index: /trunk/src/VBox/Additions/linux/installer/vboxadd-x11.sh
===================================================================
--- /trunk/src/VBox/Additions/linux/installer/vboxadd-x11.sh	(revision 50498)
+++ /trunk/src/VBox/Additions/linux/installer/vboxadd-x11.sh	(revision 50499)
@@ -297,7 +297,10 @@
     esac
     # Should we use the VMSVGA driver instead of VBoxVideo?
+    if grep 80eebeef /proc/bus/pci/devices > /dev/null; then
     vmsvga=""
-    if ! grep 80eebeef /proc/bus/pci/devices > /dev/null; then
+    elif grep 15ad0405 /proc/bus/pci/devices > /dev/null; then
         vmsvga="--vmsvga"
+    else
+        dox11config=""
     fi
     # The video driver to install for X.Org 6.9+