Multi-screen EDID Emulator Adapters

So I bought a KVM switch and then discovered that it didn't have EDID capability built into it, so now I'm trying to retrofit it as each time I switch between the laptops it loses track of which application is shown on which monitor.

The main feature of the KVM switch is it supports 3 monitors. It also supports 4 devices, but I'm only using 2 at the moment, both of which are Windows 11 laptops. Of the 3 monitor connections per device on the KVM switch (both input and output), 1 is HDMI and 2 are DisplayPort.

Both laptops have only one HDMI output and no DP output. So on both of them I have a USB-C to Dual DisplayPort adapter connected. So I connect the HDMI port on the laptop to the HDMI port on the KVM, and then the two DisplayPort ports on the USB adapter to the DisplayPort input ports on the KVM.

All 3 monitors have HDMI ports only. While the HDMI output to first monitor connection worked without issue, getting the DisplayPort output on the KVM to HDMI input on the monitor working required using an active DisplayPort to HDMI adapter.

So now that the EDID issue is known, I'm trying to figure out how the EDID emulator adapters will work. My assumption is that for the HDMI port on the KVM, this should be straightforward. But how about for the DisplayPort ports since DisplayPort uses another mechanism for this other than EDID. So my questions are

- Is there a DisplayPort EDID equivalent adapter that I can use for this?
- Would it be connected to the input or output ports on the KVM or both?
- Would I still need to use the active DisplayPort to HDMI adapter on the output ports and if so, how would the EDID emulator be attached between the KVM switch and monitor? (eg between switch and active adapter, or between active adapter and monitor)
- Anything else I need to consider for this?

 

So no, I didn't buy it off KVMGalore, like all smart purchasing decisions it was done late at night on Ebay. I consider this my penance of sorts as a result.

I realize that going with a fully HDMI switch would have been the better option, I have a similar TeSmart KVM in a different part of the house that is fully HDMI and has inbuilt EDID detection and has worked pretty flawlessly for years, but it also retails for 5 times the price I paid for this one. That said with all the extra cables this has required, plus the active DP to HDMI adapters and now this DisplayPort Hotplug Maintainer (x4) the difference goes away and this becomes the more expensive option.

I'll take a day or two to consider whether to proceed with this or just cut my loses and go with a TeSmart option unless there's another option you recommend that can support up to 4 devices and 3 monitors? No 4k display is required, there's no games being played, so 3 x 1920 x 1800 is all that is required.

The location of the adapter makes sense to me, the question mostly came from asking ChatGPT for its guidance, and not believing that its recommendation of on the output ports was correct.