Overriding Screen Resolution on Xorg in Ubuntu

This entry describes how to override the default “plug ‘n play” monitor section of xorg.conf and get appropriate settings for the screen resolution you want. The specific context is Ubuntu 8.04 (Hardy Heron) and the use of a video splitter to show the monitor output on a Dell E153FPc monitor and a Toshiba 32HL57 Wide Screen HD television. But the principles should work in other situations.