need some help with desplay drivers

[robbiethe2nd]

well, i recently installed debian on a 40gb harddisk that i have, its a seprate one from the one i use for windows(which im using now), and has basicly nothing on it. i have installed using the apt-get command gnome, and x-window-system. i used xstart and opened debian. fine right? well while it works, the desplay is only 800X600. i found the desplay resolution app and was aple to change it to 1024X768, but when i did, it realy messed up: the top-left 800X600 pix were fine, then theres about a 25 px line on the bottom and right sides going from top to bottom and left to right, and on the other sides of these lines are varius pieces of the display window... now i was able to change it back and forth, but i cannot stop the problem. it seems to be some sort of driver problem. heres the spec's for my comp:
its an ibm t40, 1.8ghz centrino, 512 megs ram. the screen is a 14.1 inch LCD. its resolution is 1024X768, and the card running it is a ATI mobility radeon 7500. it works fine in windows, so theres nothing wrong with the hardware.

also if anyone can help me, im wondering how to setup the scrolling feature of my trackpoint mouse. the trackpoint works but it has no scrolling feature in linux as of yet. can anyone help me?

edit: heres a etter way of explaining it: the first layer is over the entire screen which is what it should be. then theres 3 other copys of it on the screen, one at top right, bottom right starting at pixel 600 deep and 800 right, and 1 at 600 deep 0 right. some parts of the real copy are desplayed, and if you click on the menu button it comes up and overwrites the copys. no its not just the background, images and stuff are in there(like part of the task bar thing or the computer icon)

[objuan]

Hello
Some times debian has these little glitches with xfree and xorg
edit the /etc/X11/xorg.conf or the /etc/X11/xfree86.conf
change the max resolution from "800x600" to what ever your monitor can handle. you will find these settings at the bottom of the file. Caution
make a back up of the file before you do any thing. Here is an example of what your looking for.
Section "Screen"
Identifier "Default Screen"
Device "NVIDIA Corporation NV31M [GeForce FX Go5600]"
Monitor "Generic Monitor"
DefaultDepth 24
SubSection "Display"
Depth 1
Modes "1600x1200"
EndSubSection
SubSection "Display"
Depth 4
Modes "1600x1200"
EndSubSection
SubSection "Display"
Depth 8
Modes "1600x1200"
EndSubSection
SubSection "Display"
Depth 15
Modes "1600x1200"
EndSubSection
SubSection "Display"
Depth 16
Modes "1600x1200"
EndSubSection
SubSection "Display"
Depth 24
Modes "1600x1200"
EndSubSection