TL;DR: I can't detect my NVIDIA card from my install, only from a live USB.
After installing arch on my dell laptop I wanted to switch from integrated graphics to my NVIDIA card, specifically for CUDA support in some applications. I followed the instructions at https://wiki.archlinux.org/title/NVIDIA#Installation
Afterwards, boot is very slow, there are random messages appearing in my terminal ([<some numbers>] audit: <stuff>), and the NVIDIA card doesn't show up in lspci. However, I can see the NVIDIA card in the BIOS and from a live USB.
If I disable integrated graphics in the BIOS, then after navigating through GRUB I'm met with a blank screen.
There doesn't seem to be anything relevant in dmesg, I'm at a complete loss.