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List:       linux-thinkpad
Subject:    Re: [ltp] Using an external projector with t61 - mirror output
From:       Martin Aumueller <aumuell () reserv ! at>
Date:       2009-03-10 23:26:20
Message-ID: 200903110026.20573.aumuell () reserv ! at
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Hi Roman,

On Tuesday 10 March 2009 20:29:33 Roman Haefeli wrote:
> hi martin
>
> thanks a lot for sharing the solution. it addresses a problem, that has
> been bugging me as well for a very long time (no 1024x768 provided) and
> i had a hard time finding a solution.
> now, your method definitely works, also for me, though i have a t61 (not
> t61p) with a native resolution of 1680x1050. using the provided edid
> file doesn't work here ( i get funky lsd-ish colors on one side of the
> screen). therefore i would like to ask you about the way you created the
> augmented edid file. i found the ubuntu package 'read-edid', which
> provides 'get-edid' to obtain the binary data and 'parse-edid' to
> convert it to human readable text. but when editing the text-file, how
> can i create a binary file from that?

I followed the steps as outlined here:
http://myricci.com/index.php?option=com_content&task=view&id=36

I followed the steps described there to modify (i.e. add the 1024x768 mode) 
the edid data that I could dump with nvidia-settings (go to GPU-0, choose your 
internal LCD, acquire EDID). I used the C source code provided at the above 
url in order to do the necessary conversions and used the mentioned phoenix 
windows program for actually adding the mode.

I hope that helps,
Martin


>
> hints are very much appreciated.
>
> roman
>
> On Tue, 2009-03-03 at 15:27 +0100, Martin Aumueller wrote:
> > I got that to work on my 14" T61p (1400x1050) by:
> > - adding the line
> >        option "CustomEDID" "DFP-0:/etc/X11/t61p-edid-augmented.bin"
> >   to my /etc/X11/xorg.conf in the "Device" section
> > - and by putting the attached file into the specified location
> >
> > I found a tip on how to do that on some ubuntu web page, if I remember
> > correctly. This custom EDID file adds the 1024x768 mode to the list of
> > supported modes.
>
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