>>107615400
Works for me.
I installed nvidia-580xx-utils nvidia-580xx-dkms nvidia-580xx-settings lib32-nvidia-580xx-utils
pacman -Qm shows
lib32-nvidia-580xx-utils
libxnvctrl-580xx
nvidia-580xx-dkms
nvidia-580xx-settings
nvidia-580xx-settings-debug
nvidia-580xx-utils
>At least installing the official nvidia package returned the system to it's previous state.
Well, first you should uninstall the nvdia driver, then do a pacman -Syu, then install the AUR packages and then reboot
I removed nvidia nvidia-lts lib32-nvidia-utils nvidia-settings nvidia-utils