On 5 May 2011 22:26, edmund ronald <edmundronald at gmail.com> wrote: > I would love to get my hands on code that can read EDID direct from an > external monitor. How do you mean? GCM just reads the EDID atom on the output from X -- see http://git.gnome.org/browse/gnome-color-manager/tree/src/gcm-x11-output.c#n354 for details. Richard.