Here's a post with a Miro diagram showing my setup:
In those days I had the following:
- Virtual Storage needs to be disabled (this is still true of the Comet Pro, the KVM switches I've used get confused with a composite USB device).
- The Keyboard/Mouse port on the Comet KVM needs to be connected to the KEYBOARD port on the KVM switch - not a USB hub port.
- In my case I had to use a two-port USB hub since I'm also connecting a lapdock (a laptop-looking local keyboard/monitor/touchpad).
- I also used an HDMI splitter between the KVM switch out and the Comet/lapdock - I no longer need this with the Comet Pro.
- Note that you mentioned shortcuts, if you mean the actual Comet feature those won't work - they don't seem to handle key sequences well and will press all the buttons at once. The KVM switches often need something like "home, home, [number]" to switch while the Shortcuts feature delivers "home+home+number" as a single keypress. However, since I can never remember which of my switches uses "home" and which uses "right control" I do have shortcuts configured as a reminder - they just don't do anything.