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Old 10-21-08, 04:19 AM   #6
pmarks
Registered User
 
Join Date: Oct 2008
Posts: 1
Default Re: Disable audio over hdmi?

I just ran into this exact same problem... for an hour or so I thought my TV had fried its analog audio input. Here's a CC of the email I sent to linux-bugs@nvidia.com:

Quote:
I have a Linux box with an integrated GeForce 7050PV that I use as a
media center device. It's connected to my Samsung DLP TV, using HDMI
for video, and analog for audio.

For the past year, everything's been working fine.

However, today I tried upgrading to version 177.80 of the nvidia
driver, and the analog audio on my TV stopped working.

From what I can tell, this latest driver sends a (blank) audio signal
over the HDMI connection, which causes my TV to ignore its analog
input.

To prove my case, I left analog audio playing through my Linux box,
while physically moving the video input from the Linux box to a
MacBook Pro. When the video cable is connected to the DVI port of a
MacBook Pro, I can hear audio. When I move the cable back to the HDMI
port on my Linux box, I see video, but the audio drops out.


I think the nvidia driver should either:

1. Allow apps to send digital audio through the HDMI connection (this
is probably difficult.)
-or-
2. Allow HDMI audio to be completely disabled, as in previous versions
of the driver.

But this current in-between state of sending a null audio signal is
*bad*, and makes nvidia cards useless for most home theater PC
applications.


(note: I found an option in my BIOS for disabling HDMI audio, but it
had no effect)
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