Funny how my USB Type-C extension cord has a little label which says:
> USB 3.1/3.0 is supported on both sides. > USB 2.0 is only supported on one side. > If it doesn't work please reverse it.
And I've been trying to get my external sound card to work for half an hour.
Anyway, now finally I have the dream setup, I can switch to use my keyboard, mouse and sound card and screen on my stationary NUC or my laptop connected with one single cable (including charging) by a press of a button at my desk. I just need to insert the cable the right way.