I am able to see the monitor screen now from the controlled computer, but still have trouble to activate the mouse or keyboard of the controlled side.
I appreciate the help from Chuck but still cannot get it to work.
I am using an USB keyboard and an USB mouse on the controlled computer side and use a HP Notebook on the controlling side.
The notebook has a touchscreen and a touchpad. I am usually use a wireless mouse to work with it.
None of the features work with the KVM.
Now it works. Slow but, it does. No Idea what I did. But anyway: Thank you all the great help.
I would try by disconnecting your duplicate display completely and just stick to a single display on your server PC to begin with to see if this would work.
Try a different USB cable between the RM1 and the computer for keyboard and mouse.
I had a similar problem. The cables included for keyboard and mouse on my RM1 units were 1 USB-C to USB-C and 1 USB-A to USB-C. I used the USB-A to USB-C for power, but my computers were older and didn't have a USB-C input for keyboard and mouse, so I had to supply my own second USB-A to USB-C.
Some USB-A to USB-C cables that come for charging devices are power only and one of them I pulled out of my box of spares didn't work because of that, so I had to replace it with a standard, fully wired cable.