On Sun, Jan 22, 2012 at 1:07 PM, G.Wolfe Woodbury <redwo...@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
