On Sun, Jan 22, 2012 at 10:58 AM, Michael Mol <mike...@gmail.com> wrote: > 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. >
Yeah, I did that sort of stuff already. It didn't tell me anything specific as best I could tell. However I haven't done it with the KVM out. Maybe comparing the two responses would give some clues. Also, thanks for the pointer to xvidtune. Interesting little app. QUESTION: Do you know how to get the data for each monitor/video card combo? So far I haven't figured out how to tell it Screen2. Seems to only give me Screen0 as best I can tell. I'm a bit nervous to just start trying things. Cheers, Mark
