how is initial xorg.conf generated? any options for this?

[Sergey]

there is a tool system-config-display which gets your video card detected and 
lets you choose the video modes to be set up by default.

if you're interested in technical details, run diff after running 
system-config-display and you will notice one little change which makes the 
selected mode run by default.

xorg.conf can also be generated by running Xorg -configure.

----- Original Message -----
From: Skunk Worx <skunkworx at verizon.net>
To: For users of Fedora Core releases <fedora-list at redhat.com>
Subject: how is initial xorg.conf generated? any options for this?
Date: Thursday 08 December 2005 11:38

>i have a hard disk image i clone off with no xorg.conf under /etc/X11.
>it will be a live DVD soon--no way to know what chipset or display will
>be on the booting machine.
>
>when booted into runlevel 3, and then "startx", i see an xorg.conf gets
>quietly generated on the fly.
>
>Three questions:
>
>1) Is there a way to set a default resolution in the generated xorg.conf
>file? Say 1024x768? would this even make sense not knowing the monitor type?
>
>2) Is there a way to set "no dri"? some machines are locking up randomly
>on the first startx, they use the ATI radeon 7000 chip...commenting out
>load dri fixes this, but is there a way to (by default) not have dri in
>the initial xorg.conf creation?
>
>3) If 1) or 2) are not possible, is there a place to hook into the X
>startup chain so i can run a script to make these mods?
>
>Thanks,
>SW