Originally Posted by |MaguS|
Could it be a Windows XP issue?
I'm not sure, but there's definitely something in the nvidia driver that enables the HDMI audio stream. I posted about it a while back. In my situation I was trying to use the HDMI out for video and the mobo's analogue mini stereo out for audio (input to the same TV). With the older drivers I was able to do so, but when I upgraded to 17x.xx the audio stopped functioning. Audio was still being output through the mobo, but I suspect the nvidia drivers had enabled permanent digital streaming regardless of what audio output type selected in the realtek or other sound driver.