ftp://download.nvidia.com/XFree86/gpu-hdmi-audio-document/gpu-hdmi-audio.html#_verify_your_eld_is_valid
do you have valid ELD ?
ftp://download. nvidia. com/XFree86/ gpu-hdmi- audio-document/ gpu-hdmi- audio.html# _verify_ your_eld_ is_valid
do you have valid ELD ?