I've returned to FreeBSD after many years, and I just built 14.0 to get CUDA working. CUDA doesn't need this to run AFAIK. This is about the kernel providing a module that allows a direct rendering interface. CUDA doesn't render to the screen. IIRC, DRI/drm are kernel drivers for graphics that map the GPU video memory window into your process so you don't have to copy data or send it though a pipe or some such nonsense. it was a video optimization from the early days of Linux graphics when copying