Need NVreg_PreserveVideoMemoryAllocations=1 option, without it memory allocation will not work.
https://download.nvidia.com/XFree86/Linux-x86_64/545.29.06/README/powermanagement.html#PreserveAllVide719f0

https://wiki.archlinux.org/title/NVIDIA/Tips_and_tricks#Preserve_video_memory_after_suspend