Re: [gentoo-user] KVM problems - anyone know _why_ it happens?

[Michael Mol <mikemol@gmail.com>]

On Sun, Jan 22, 2012 at 1:07 PM, G.Wolfe Woodbury <redwolfe@gmail.com> wrote:
> 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 from
> the monitor.  I 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.


-- 
:wq