Changing screens

[Matthias Brennwald <matthias@brennwald.org>]

Dear all

I've got a laptop (Apple PowerBook G4) that I use both at home and on 
the road (with Debian Etch installed). At home, the laptop is connected 
to an external screen, with the laptop closed (so, at home, I don't use 
the laptops own screen). The two screens have different resolutions 
(laptop screen: 1440 x 1024, external screen at home: 1280 x 1024).

The problem is that Debian uses the same screen resolution for both 
screens, wich I find annoying (it uses 1440 x 1024, which means that the 
image is larger than what fits on my external screen). How can I make 
Debain use the appropriate screen size? Do I have to set it manually or 
is there a way to adjust the screen size automatically?

Matthias