Diagnosing Signaling Issues

[maul0r]

Hi, 

 

I have recently watched the HDMI and DP Port Testing videos I was wondering if someone might help me figure out what's going on because I don't know how to troubleshoot this. 

 

We have a special kind of KVM that "sometimes works" and sometimes doesn't. It supports HDMI and DP in one port. Watching the DP Cable testing Video (and also before) I assumed that DP was the better plug and protocol to use (doesn't wiggle, cables are thicker therefore (hopefully) less prone to interference etc).

Sometimes the computers work, other times just one of the monitors work, sometimes you get strange color artifacts (usually on the HDMI ones which I think has to do with wrong seating of the cable). This is not the KVM switch being broken, because we have a lot of them, and they all exhibit this behavior. Is there any tool / device / application we could use to see if there is protocol negation error, signaling problems of any kind? To be "Monitor Cables" was always one of those things that "just works". Anybody has any helpful points on how I could trace down the source of the problem?

[Alex Atkin UK]

I'd just assume its the cable as its the sort of issues I've had and switching cables always solved it.

 

I've noticed some cheaper optical cables are on the market now, switched some of my devices to those and no more issues (except one of them the picture cut off a couple of times, I'm wondering if the 3080 gets too hot for its chip in the plug).