Ubuntu 21.10 - "Failed to grab modeset ownership" with 495.44 - #37 by amrits - Linux - NVIDIA Developer Forums
The warning message is expected. When a client (such as the modesetting driver) attempts to open our DRM device node while modesetting permission is already acquired by something else (like the NVIDIA X driver), it has to fail, but the kernel won’t let us return a failure after v5.9-rc1, so we print this message. It won’t impact functionality of the NVIDIA X driver that already has modesetting permission. Safe to ignore as long as long as you didn’t need the other client to actually get modesetting permission. If you want to suppress the error, you would need to find which client is attempting to open the NVIDIA DRM device node and prevent it from doing so.
Yeah np, this drm grub command was a great work-around for several month, but nvidia only fixed this bug 7 month later and this grub command only worked for 5 month.
This was one of my worst experience with nvidia support, but atleast there was always other workaround available and i think that AMD isn’t the holy grail either.
Flames arent intended, and I have no loyalty to any given multi-million-or-billion-dollar corporation.
But I will say that records of hostility to opensource, even if reversed recently in earnest, will have had a foundational impact on efficiency and interoperability. And technology is one of those things where equations tend to work in an exponential fashion.
(further observations about economics and so forth not even being considered)
Im also glad that you arent in the position of wanting to throw your device out of the window.