CUDA fails with CUDA call "cu->cuInit(0)" failed with CUDA_ERROR_UNKNOWN (999): unknown error

NVIDIA Open GPU Kernel Modules Version

560.28.03

Please confirm this issue does not happen with the proprietary driver (of the same version). This issue tracker is only for bugs specific to the open kernel driver.

• I confirm that this does not happen with the proprietary driver package.

Operating System and Version

NixOS 24.11 (Vicuna)

Kernel Release

Linux laptop 6.6.42-xanmod1 #1-NixOS SMP PREEMPT_DYNAMIC Tue Jan 1 00:00:00 UTC 1980 x86_64 GNU/Linux

Please confirm you are running a stable release kernel (e.g. not a -rc). We do not accept bug reports for unreleased kernels.

• I am running on a stable kernel release.

Hardware: GPU

NVIDIA GeForce RTX 3050 Ti Laptop GPU (UUID: GPU-357aa0ab-a71e-7d0a-b7bd-4d2a99d4e383)

Describe the bug

When I try to use anything that uses CUDA (trying to record with OBS, re-encoding a video, running hashcat), it fails with CUDA call "cu->cuInit(0)" failed with CUDA_ERROR_UNKNOWN (999): unknown error.

To Reproduce

• Just run a program that uses CUDA

For exemple:

• Try to record something using OBS.

Bug Incidence

Always

nvidia-bug-report.log.gz

nvidia-bug-report.log.gz

More Info

This bug disappears after running nvidia-bug-report.sh for some reason, CUDA works again after running nvidia-bug-report.sh.

Edit: After more research I found out that running nvidia-settings as root somehow fixes the problem.
Edit 2: Loading the nvidia-uvm module though modprobe nvidia-uvm fixes this issue

Start by reproducing the CUDA failure with OBS, video re-encoding, or hashcat on the listed NixOS and kernel versions. Compare behavior before and after loading nvidia-uvm with modprobe, and review the attached nvidia-bug-report.log.gz and nvidia-bug-report.sh output. Done means identifying the driver cause and confirming a reliable fix for cu->cuInit(0).