As mentioned for some reason the latest NVidia driver are acting different during system boot to initialize the GPU support. I stumbled across this during my research on why my card didn’t fully work in Incus after system reboot. Some people mentioned their X-Server didn’t come up or similar. Not sure if NVidia will fix it anytime soon. DOn’t have that link handy but you will find it.
There are quite a few topics around this issue and so far I haven’t found the golden solution that works out of the box. For example Container with nvidia.runtime=true refuse to start after reboot of the host is more or less doing the same like I mentioned “run a small proc to intialize”. I haven’t tried the solution mentioned in this topic and if nvidia.runtime=true will work. In my case I run into some permissions issues following this path during testing, so I decided to install drivers locally. May revisit it again if time permits…
For now there is a solution / workaround that keeps my container applications happy.