Maybe I was jumping to conclusions actually? mhwd -l gave me video-hybrid-intel-nvidia-390xx-bumblebee AND video-hybrid-intel-nvidia-prime (and free drivers) for the Intel+nvidia chip. But what is video-hybrid-intel-nvidia-prime ?? In live-boot I get video-hybrid-intel-nvidia-455xx-prime instead! Anyways, I opened a separate topic Xorg errors with notebook dedicated/builtin graphics, don’t want to compromise this one.
@mozzribo what does sudo pacman -S mhwd-db and then mhwd -l give you?