Shall I guess that your linux install automatically boots into a graphical mode?
In that case, you have to change that AND we will fix your graphics at the same time.
Firstly, download RIP Linux (this is a Live CD which lets to fix linux stuff) http://www.tux.org/pub/people/kent-r...IP-8.5.iso.bin
and burn the ISO in windows.
Boot the computer with RIP linux in the cd drive.
1. mount /dev/<partition where linux is> /mnt/linux
I appreciate that <partition where linux is> isn't very helpful, but you will have to find this out. You might be able to do "fdisk -l" and it will tell you. if the hard drive is the primary master, then it will be "/dev/hdaX", if primary slave "/dev/hdaX". The X is the partition number.
2. nano /mn/linux/etc/X11/XF86Config
here, you will find a section called "Screen sections" and there will be some lines in there like:
Identifier "Screen 1"
Device "nvidia integrated 32Mb"
Monitor "multisync 75F"
Modes "1280x1024" "1024x768" "800x600" "640x480"
ViewPort 0 0
# Modes "1280x1024" "1024x768" "800x600" "640x480"
ViewPort 0 0
Find which Display is your default (eg "DefaultDepth 16") and the go tothe appropriate
Depth (eg "Depth 16"). Set the mode there to whatever you want. Of coruse, your graphics card might not support 16 depth, so try something like 8. You could also go back to 800x600 to test that it works.
Then exit (ctrl + X) and save on your way out.
Assuming that your video card module is loaded, this will work.