I need a recommendation for a KVM switch.  I have 2 video cards installed (my mother board, an ASUS M5A97 R2.0 has no on board video) in my UNraid box running v 6.6.6. I have a Windows 10 VM hooked up to a Radeon HD 500 card.  The system card is an old PCI Radeon card. The VM works fine when directly hooked up to my Samsung monitor, however it only works intermittently when I attach a KVM switch I had lying around.  The connections are DVI. Additionally, when the VM did display, it only displayed at 1024 resolution.  Any suggestions on a switch?

I have a AV Access 4*1 HDMI KVM Switch. 

 

I am not happy about the usb switching (keyboard & mouse) but it's on unraid side; I had to play with some scripts and still its not stable. Ideal would be to passthrought the while usb controller but in my case not possible. 

 

But screen switching works great.