I am not very sure if this will help you solve your problem, but you can give it a try anyway.
From your previous post it looks like you are using F16 on your netbook.
Normally the display settings are present in xorg.conf file under /etc/X11/, but with F16 this is not a default feature as X server configurations are determined each time X is started.
In your case since X server is not providing you the resolution of 1024x768 you can try creating an xorg.conf file using the command
This will create a default file under /root/xorg.conf.new. You can copy this file to /etc/X11/xorg.conf.
After copying you can make changes to the "modes" parameter under "Screen" section and add the resolution you want.
I hope this helps you resolve the issue. Using xrandr was another option, but from the other posts I can see that its not working out in your case.
Good luck!