On 22 January 2012, at 15:54, Mark Knecht wrote:
> ...
> Basically, I looked around in Google for anyone that had real info
> about why this problem occurs, couldn't find any that made sense, and
> am wondering how to choose a KVM that's going to work out of the box
> short of asking for model numbers, etc.

For all you've written, I'm afraid the best answer you're likely to get it "buy 
a KVM you can return" (or buy secondhand at a price you can resell without 
loss). 

Video resolutions / refresh rates / timing / &c is a bit of a black art. What 
the heck is a modeline? 

The manufacturer of a KVM isn't going to be able to test it with all the 10,000 
monitors available on the market today - not even 1% of them. They're happy if 
it works 99% of the time, and if you complain to them they'll say "oh, it must 
be a bug with that monitor" and maybe, eventually, give you a refund for the 
sake of a peaceful life. 

There are probably a handful of different KVM chips that are made by big 
manufacturers in Taiwan, and then sold by the 10,000 to other manufacturers, 
this time manufacturers of actual KVM units. These second tier manufacturers 
probably all wrap the KVM integrated circuits up in slightly different ways, 
using slightly different resistors and capacitors to interface with input and 
output. 

So in terms of your specific questions, I'm not able to answer very helpfully. 
I think you could waste a lot of time trying to get these answers, whereas you 
could swap in a specific model and try it in a matter of minutes - and that way 
you'd know for sure.

Stroller.


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