How to change screen resolution from cli ubuntu, gnome, 8.10?

Just installed ubuntu 8.10 (i think). The resolution was horrible it flickered and was green so i tried to change the resolution (to a higher one, stupidly) and my monitor says ';out of scan range'; so i hit esc like 50 times but it never changed back. Now any time i start up its in the same ';out of scan range'; resolution.



I've tried logging in to the root console and trying ';xrandr -s 800x600'; it just says ';cant open display'; I also tried fix X config settings from the recovery menu, that didnt do anything.



How can i reset the resolution for the user to something like 800x600 so i can at least see to fix stuff in the gui. Or how can I just delete the file that has the profile info (resolution) so it will default to something ?



update

just tried sudo pkg --configure xserver-xorg it says its already configured and does not let me do anythingHow to change screen resolution from cli ubuntu, gnome, 8.10?
Have you done an initial download? The drivers for ATI and Nvidia are not included on the CD (legal stuff). Do not go into Synaptic Package Manager just yet. Install these packages and reboot. go to System%26gt;administration%26gt;Hardware Devices and activate the appropriate drivers for your system. Reboot. That's it good luck!

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