For some reason, this image doesn't have the correct rc*.d links for xdm, so
xdm doesn't start at boot and you'll just get a grey screen when you connect
via VNC.

The correct Debian way of fixing this is:

	update-rc.d -f xdm remove
	update-rc.d xdm start 99 2 3 4 5 . stop 01 0 1 6 .

... or you can just add the missing symlinks by hand.

Of course, without accelerated floating point, the X11 display is so mind-
bogglingly slow under QEMU that this fix is scarcely relevant.  If you need
useable X11 on an ARM VM, I suggest that you try an ARM EABI (armel) VM
instead.