WD19, power button, usage on a ThinkPad?

Hi there, not sure where to post this so apologies if it's in the wrong place.

I recently purchased a Dell WD19 Dock, and I currently use it on my Thinkpad (L380).

Everything works perfectly, without problems, except for the power button. It doesn't turn on and off the Thinkpad, neither does the light activate when the system is on. I know that the button (the light at least) is working because it flashes when I plug the dock in.

Does anyone know if there's a driver I could download or a BIOS setting I could change to allow the button to work? Or are they just incompatible? I am aware that they work best on Dell laptops, of course.

Again, apologies if this is in the wrong place. If it is, please tell me and I'll move it to the correct place.

Many thanks,

Ollie.