screen resolution problem

[Atro]

i installed linux this weekend for the first time since university. but i have a strange/frustrating problem. when i try set the screen resolution, it always resets itself to 640x480. do i have to update it somewhere else? the screen resolution is at 1024x768 when knoppix runs from CD, so I'm guessing my hardware is fine. It's when I boot it up without the CD, that I can't set the screen resolution. Can anyone help?

[Atro]

actually i'm not even sure if the changes are being saved. could be that the configuration file where the values are stored is read only. but i don't know which file the values are saved in. i'm way off, aren't i?

[pulsar]

You can save the screen resolution in Xdisplay. Open a terminal and type in as root "/usr/bin/kxconfig".

[DuckDodgers]

Try adding your desired screen resolution (example: "1024x768") to /etc/X11/XF86Config-4 as root and reboot. This worked for me with Debian "Sarge" after doing net install. You may even need to run the following commands as root after editing this file:

# cp /etc/X11/XF86Config-4 /etc/X11/XF86Config-4.custom
# md5sum /etc/X11/XF86Config-4 > /var/lib/xfree86/XF86Config-4.md5sum
# dpkg-reconfigure xserver-xfree86