linux-kernel - Re: [Linux-fbdev-devel] [PATCH] nvidiafb: allow ignoring EDID info

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Message-Id: <1172101406.4217.16.camel@daplas>
Date:	Thu, 22 Feb 2007 07:43:26 +0800
From:	"Antonino A. Daplas" <adaplas@...il.com>
To:	Giuseppe Bilotta <giuseppe.bilotta@...il.com>
Cc:	James Simmons <jsimmons@...radead.org>,
	Luca Tettamanti <kronos@...ple.it>,
	linux-fbdev-devel@...ts.sourceforge.net,
	Andrew Morton <akpm@...l.org>, Dave Airlie <airlied@...il.com>,
	linux-kernel@...r.kernel.org
Subject: Re: [Linux-fbdev-devel] [PATCH] nvidiafb: allow ignoring EDID info

On Wed, 2007-02-07 at 00:08 +0100, Giuseppe Bilotta wrote: 
> On 2/6/07, James Simmons <jsimmons@...radead.org> wrote:
> >
> > If you can find post the manufacturer and model number we can place it on
> > the backlist in fbmon. Also we should figure out what is wrong and fix it.
> 
> It's the UltraSharp UXGA display that used to come with Dell Inspiron
> 8200, 15" with a resolution of 1600x1200. I've been looking all around
> for more info on it, but the only things I could find were posts that
> remarked the problems Windows nVidia drivers have with some of these
> (no image when running at 1600x1200), and other posts about banded
> gradients with Windows drivers on Radeon video cards (but I get banded
> gradients also win my nVidia card, on Linux, regardless of which
> driver I use, binary, nv or nouveau).
> 
> As mentioned in another post in this thread, I can't get any info out
> of the i2c busses, because even when I have them available (i.e. after
> loading nvidiafb) I get XXXX all around (on all three of them).
> Suggestions on how to get the information welcome.

Is this the same monitor you posted here?

http://marc.theaimsgroup.com/?l=linux-kernel&m=112807065616218&w=2

If yes, we already have the manufacturer and model code. The main
problem is that the EDID of this display has no sync range (H: 75-75kHz
and V: 60-60Hz).  Extending Hsync from 30-75kHz as a fix to the EDID
block shouldn't be too hard.

I already have a patch for this which I forgot to send to you
before :-).  If you can confirm that this is still the same hardware,
I'll send you a test patch

Tony

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