May be its worth to give nvidia a hardware menu entry.
Like this? https://libreelec.tv/downloads/generic/
Wiuth old cards like a Quadro 400 (2011?) you'll need to compare the card PCI device ID with the nVidia udev rules to see if it's supported:
LibreELEC.tv/packages/x11/driver/xf86-video-nvidia/udev.d/96-nvidia.rules at master · LibreELEC/LibreELEC.tv
Just enough OS for KODI. Contribute to LibreELEC/LibreELEC.tv development by creating an account on GitHub.
github.com
One of several challenges with nVidia support is that compat with Xorg is a moving target and eventually old(er) driver releases that are no longer actively maintined by nVidia require older Xorg versions than the current Xorg that we embed and things break. See:
xf86-video-nvidia: update to 535.104.05 by heitbaum · Pull Request #8090 · LibreELEC/LibreELEC.tv
Major Bump of nvidia
Update from Latest Legacy GPU version (470.xx series): 470.199.02 to Latest Production Branch Version: 535.104.05…
github.com
You could try using an older LE release (older Xorg codebase with older drivers) or to use a more general purpose distro where things are less bleeding edge and you can still load and use older nVidia drivers.