do you have a usb3 (blue ends) A to B cable going from the computer to the kvm? Can you take a pic of the front and back of the kvm? what are the LEDs on the front doing? You’ll get a red light for each port where USB to the host is correctly detected.
so while I always had a usb 3 a to b cable connected and leds were green and red at the front, it only just started working today.
Only thing I changed was disconnecting and reconnecting dc power of the kvm. I don’t know if windows was the issue and needed another hello or something inside the usb hub was glitching out, but now everything seems as intended, keyboard, mouse, usb mic and dac are all running. hotkeys via hid keyboard are also working.