I am trying to understand what happens when I plug in a Nitrokey USB stick. With a laptop (for example) and with the correct public key on the laptop, when I plug in the Nitrokey I get a popup window with a PIN entry box. I enter the PIN and the stick encrypted drive opens and can be used as required.

When I do this and plug the usb into a multimedia device running OSMC (Kodi) I do not get any popup. There is an additional problem in that the multimedia device is intended to work with the Kodi remote. This is essential for convenience but knowing what is going on would be a start.

I am trying to understand what is happening when this PIN entry process starts. Is it started by the usb stick of the laptop system?

Where do I start my reading?