How you install it?
Have you tried AUR xmr-stak-nvidia (has a CUDA patch) or xmr-stak-nvidia-git?
Have you tried xmrrig?
Besides, mining xmr with GPU…why?
Anyway, show your GPU info
inxi -Gaz
and what package of cuda you have installed?
I’m not sure about that, rolling release distro is not something popular among serious miners, for a good reason… 