nvidia is currently partially incompatible with linux >= 5.9 [[1]](https://forums.developer.nvidia.com/t/nvidia-driver-not-yet-supported-for-li...) [[2]](https://bugs.archlinux.org/task/68312). While graphics should work fine, CUDA, OpenCL, and likely other features are broken. Users who've already upgraded and need those features are advised to switch to the linux-lts kernel for the time being until a fix for nvidia is available. URL: https://www.archlinux.org/news/nvidia-45528-is-incompatible-with-linux-59/