Could be that this creates some kind of conflict. Just installing sudo pacman -S nvidia-dkms nvidia-settings and rebooting works and the laptop uses Intel. The Nvidia switches on when I connect an external screen and works as expected.
Using the nvidia-installer-dkms script to I install my driver instead goes black screen. I could try to redo this step and change the grub or inspect at least what’s in there for the sake of bug fix.
What also concerns me is that the live iso goes through all downloads and installation process, but for the last steps it wants to use the nvidia-installer script and then fails. I therefore have to install via nouveau and not Nvidia option. The Nvidia option worked relatively recently, August/September.
I will link to at least the message I get when install fails.