I have a Dell Latitude D600 with a 1400x1050 screen. This system runs a farily late version of WhiteBox Linux and XFree86 4.3.0. This works like a charm and I can do almost anything on this baby.
What I can not do
is reduce the screen resolution; everything becomes just black if I do. The way I do it is to edit the "modes" line in the XF86Config file from
Modes "1400x1050" "1280x1024" "1280x960" "1152x864" "1024x768" "800x600" "640x480"
Modes "1024x768" "800x600" "640x480"
Funny thing is that if I connect an external monitor I can fiddle with the screen res till my little hearts content but not in the internal one. Just for the record does this work when I run WinXP, it is just XFree that gives me a hard time.
The point is that I want to use this machine for presentations and most projectors, at least the ones I can afford, can not handle more than 1024x768 pixels.
While I now can run a projector on the VGA port I am not able to use the internal LCD as monitor. This would be nice since I plan to do some demos as part of the presentation and having to look over my shoulder is not only painful but looks slightly unprofessional, if you ask me... :-)