Ask user to restart Ollama after Nvidia driver updates

[owenzhao]

In Windows, if a new version comes, Ollama widget will ask user to restart Ollama to upgrade to the new version. This is a feature I like a lot. However, I think Ollama should also ask the user to restart Ollama if it detect that the GPU driver is upgraded.

I noticed that after I upgraded my Nvidia GPU driver, Ollama ran very slow. Then I found that the GPU was not working and Ollama only used the CPU. So I made a system reboot and everything went fine.

So I guess Ollama used the old driver with the GPU but since the old driver was no longer existed. It fell back to the CPU. So at this time, it is best if Ollama can ask the user to restart Ollama so the speed wouldn't be slow.