EDID for X

In X Window, when running headless, the resolution can be defaulted to something poor since no monitor's attached.  Apparently one can snag the EDID information for the monitor, save it to a file, and specify it in xorg.conf.  One wiki page describes how to extract the EDID info, but nvidia-settings has a means of extracting the monitor EDID info when it's plugged in.  Of course, that wiki's description of how to set up xorg.conf is useful.  The NVIDIA Tips and Tricks wiki also has a description of setting up the EDID for headless operation.