change res to 1200 * 800

[tom p]

i have changed the files as indicated, i didn't find anything like modeline or anything in XF86Config-4.in

that's a template file to generate XF86Config-4 (and I didn't tell you to edit that file )

under section "monitor"
#1200x800 @ 60Hz (VESA) hsync: 48.4kHz
ModeLine "1200x800" 90.00 1200 1232 1384 1520 800 803 806 827

under section "screen"
subsection "display"

i have added "1200x800" to all availiable depth

that should be ok; if your display can work with the new ModeLine (remember, you probably have to adjust the settings somewhat), you should have the full 1200x800 display size the next time you start X.

Thomas