This utility modified a binary EDID file and disables EDID extensions and updates the checksum. This can be used as an override for nVidia's linux drivers that assume your monitor is a TV.

Download, extract, make.

Usage: ./edid_disable_exts [input_file] [output_file]

See Fixing Ugly DVI/HDMI Displays due to EDID bugs on nVidia drivers for more information on why you might use this.

Download (Source):
http://analogbit.com/sites/default/files/edid_disable_exts.tgz
Download (AMD64 static binary)
http://analogbit.com/sites/default/files/edid_disable_exts_amd64_static.tgz

Discussion for this utility has moved to the edid_disable_exts forum.