My suggestion:
- Test a “mainstream” Linux setup, like Ubuntu 24 LTS with their built-in NVIDIA driver installer and check if you see the same instability. The reason for this is you’d want to show that your issue happens (or doesn’t happen, even better) on a commonly-used, well-tested setup, as opposed to on a niche, custom setup. I suspect NVIDIA may be more motivated to investigate this.
- Create your own thread to track the status of the problem, and describe the issue in a practical way. E.g. instead of vague “non-existent shared VRAM”, I would title the problem as “Ubuntu desktop instability on high VRAM utilization” or similar.
a) Include a concise description of the problem, setup, repro steps, and how the same works fine on Windows.
b) Include a bug report file, as per https://forums.developer.nvidia.com/t/if-you-have-a-problem-please-read-this-first/ - Reference your thread in the 580 driver feedback thread: https://forums.developer.nvidia.com/t/580-release-feedback-discussion/