I bought a Displayport KVM switch to switch between two PCs using the same two monitors and I cannot get one of the monitors to work if I use an Adaptive HDMI to Displayport Cable/Adapter and Displayport to DVI cable either side of the KVM. Its easiest to show in a diagram as below. The first diagram shows the problem (Red route).
https://www.dropbox.com/s/n9spxhd7vepmtg5/KVM%20DisplayPort%20Issue.JPG?dl=1
My 2 monitors only have DVI and VGA inputs. What I cant understand is that if I borrow a 3rd monitor with a DP input and connect this (3rd Diagram), the HDMI>DP cable/adapter works as there is a DP>DP cable between KVM and Monitor, but it wont work if there is a DP>DVI cable between KVM and Monitor.
I went with a Displayport KVM as opposed to a DVI one as my PC2 GPU only has DP outputs and my PC1 GPU has 1 DP output and I figured I could get a HDMI>DP adapter for its HDMI output. And I had two DP>DVI cables anyway.
I've tried two different HDMI>DP adapters/cables. Neither worked and they are pricey so don't want to have to purchase a third. If I could confirm an adaptive DPI>DP adapter would work I would purchase one of these instead.