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Hi Mike :-)
My girlfriend also likes another resolution to myself, and I found it a little tricky to change the resolution and here's why:- once you have started the X server, thats the resolution you have got. If you go down to a lower resolution, the screen size will change, but not your desktop. So if you can see the top of your screen, you can't see the bottom, and you would have to move your mouse down and then the screen moves with it. It works when playing a game at a different resolution, but not particularly well with a desktop :-/ You can see what I mean by using CTRL+ALT+- & + to go up and down in resolution. As GDM needs to have the X server running, you can't change the resolution. The solution I came up with was this, and its a bit rough and ready, but it works!
Edit your XF86Config file. Its in /etc/X11. You'll have to do this as root.
Here's mine:-
Subsection "Display"
Depth 8
Modes "1280x1024" "1024x768" "800x600" "640x480"
ViewPort 0 0
EndSubsection
Subsection "Display"
Depth 16
Modes "1024x768" "800x600" "640x480"
ViewPort 0 0
EndSubsection
Subsection "Display"
Depth 24
Modes "1280x1024" "1024x768" "800x600" "640x480"
ViewPort 0 0
EndSubsection
I like 1280x1024, but my girlfriend likes 1024x768 so I set the Depth 16 settings to start with 1024x768. If she wants to use the computer, she logs in on the terminal, then types:-
desktop
This is aliased in a file called .bash_profile in /home/jules:-
alias desktop="startx -- -depth 16"
and low and behold, everyone is happy :-) Sure we have to logout to change user, but as you can save your sessions exactly in Gnome and I have ppp on demand, its a fairly smooth transition. I am sure there is a better way to do this, but I think it may be a solution for the moment. Yes your wife will be running in a slightly different colour depth, but if you don't tell her she'll never notice ;-)
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