Smart Card Keyboard & KVM

I am looking for a KVM switch that will work with this Dell smart card keyboard. I am using 2 computers, a laptop via a laptop dock and a desktop, so anything scaled for a data center is out of reach. I’ve tried an Iogear GCS634U with no luck. Any ideas? Thanks.

My experience with KVM switches is that they work pretty well for the normal keyboard function, but not at all well for any extra buttons or controls. I think they emulate a standard keyboard somehow as a sort of placeholder, but none of the other gewgaws are standard and aren’t emulated, and stop working when you switch computers.

Oddly data center switches are likely worse, as all the in-rack keys and pointing devices are I have seen are pretty bare bones.

I use this unit

which is, alas, twice as expensive.