11th gen mainboard + coolermaster case + KVM switcher == shutdown : (

I’ve got Ubuntu 24.04 LTS running on a 11th gen mainboard pulled from an original 13" Framework laptop and hosted in a Coolermaster case. It all works great until I hit the switch on the KVM and then the whole thing shuts down. And it’s very difficult to get it to turn back on!

Like any PC, I expect it to keep running when it’s not the focus of the KVM. What gives?? How do I fix it? Thanks!