Can someone tell me that I'm stupid?
It's just the emulated conrtoller of VirtualBox:
If you can find your own mistakes, you are doing well. Your own ones are toughest to find because you _know_ they're right.
About Experimental drivers, I didn't steer you very well
General Setup --> Prompt for development and/or incomplete code/drivers
Of course, I don't know if you'll need them now. Intel stuff is fairly well supported.