PS:
Funny that it DOES seem possible to install Ubuntu on an OMEN-17 after all.
I quickly read through the steps and recognized them.
Of course, I did not press install but went for the direct boot from stick.
In any event, my feeling now is that what the machine says is correct: there is a problem with MY BIOS.
As I took pics, I will send them to HP as well.
“Something is rotten in the State of Denmark” (again). ;)
@ajsadauskas @technology
@emilymbender