upgrade broke my external monitor setup

[Ronald van der Pol]

Once again, an Ubuntu "upgrade" broke my X setup. Where can I find good
documentation about how to configure an external monitor on intrepid? I
want output either on my laptop screen or on an external monitor/beamer
by switching with Fn-F8. Laptop screen and monitor screen have different
resolutions and the graphics card is an Intel Corporation 82852/855GM.

	rvdp