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Date: Sun, 22 Jan 2012 13:58:00 -0500
Message-ID: <CA+czFiCrj5yjT6atG1QRFMvVxsM8vqK0ZmdZPj-NHAesG6qhCQ@mail.gmail.com>
Subject: Re: [gentoo-user] KVM problems - anyone know _why_ it happens?
From: Michael Mol <mikemol@gmail.com>
To: gentoo-user@lists.gentoo.org
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On Sun, Jan 22, 2012 at 1:07 PM, G.Wolfe Woodbury <redwolfe@gmail.com> wrot=
e:
> On 01/22/2012 12:42 PM, Mark Knecht wrote:
>>
>> I played a bit with get-edid | parse-edid. Logically that stuff even
>> working says the VGA monitor cable is bidirectional. I started wondering=
 if
>> the KVM messes up the data coming back, or what else might be going on.
>> Thanks for the ideas, Mark
>
> Many of the cheap KVM models do, indeed, mess up the EDID data coming fro=
m
> the monitor. =C2=A0I suspect that this is from old design specs that have=
 too
> much pull-up/pull-down on the EDID lead since the boxen haven been
> re-engineered for newer, higher resolution and higher speed monitors.
>
> I have had problems specifically with the BELKIN KVMs.
>
> It may also be that the video drivers for Linux are just enough different
> (necessarily) from the MSFT drivers to not reliably sense the EDID return
> signals.

Concur. It sounds like the EDID block isn't making it back or is
somehow messed up. x11-misc/read-edid would help in investigating that
kind of issue.


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