Re: NVIDIA: no sound to TV via HDMI

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On Mon, Jan 25, 2010 at 5:42 PM, Dennis Gilmore <dennis@xxxxxxxx> wrote:
> On Monday 25 January 2010 03:04:49 pm Marcel Rieux wrote:
>> On Mon, Jan 25, 2010 at 4:30 AM, Ed Greshko <Ed.Greshko@xxxxxxxxxxx> wrote:
>> > Bill Davidsen wrote:
>> >> Marcel Rieux wrote:
>> >>> Since the NVIDIA forums are just a lost of time, I'll first ask the
>> >>> question here.
>> >>>
>> >>> I have an NVIDIA 9400GT card and a Sony LCD TV linked with an HDMI
>> >>> cable.
>> >>>
>> >>> First problem I found: the S/PDIF cable -- which is needed only with
>> >>> NVIDIA cards -- wasn't installed. The plug had a molding problem and
>> >>> one of the 4 holes was blocked. (The hole was just empty: no wire
>> >>> going to it.) I opened it with a pin, installed it with the arrow
>> >>> facing the closest part of the motherboard, reversed it, and, of
>> >>> course, sound doesn't come out of the TV. It's an Nvidia product!
>> >>>
>> >>> Anybody got this working?
>> >>
>> >> Did you get PulseAudio to send output to the connector? Many times this
>> >> is a PA config issue.
>> >
>> > That is actually a very good question....
>> >
>> > Everything I would find out about ASUS Nvidia 9400GT based cards
>> > (assuming this is an actual card) is that the spdif cable is simply a
>> > pass though.  One connects the spdif cable from the graphics card to
>> > either a sound card connector or motherboard connector (depending on
>> > your system and its configuration) and sound is simply passed through to
>> > the HDMI.
>>
>> That's how it's *supposed* to work.

> Ive never heard of such a config for hdmi.  My myth box does hdmi out  i plug a
> hdmi cable from the computer to the tv. audio and video both go over the same
> cable.

Same here. Read carefully what is said about the s/pdif cable. If you
have an ATI card, you don't have one.

> Selecting the right profile in pulse audio activated things correctly.
> i get sound though my tv.

Glad for you! How do you select the profile in pulseaudio, if not by
right clicking the speaker icon in the top panel, like was explained
in preceding messages?

> due to the way hdmi works you do not get volume
> control on your computer.  it passes a constant signal  which the end device
> uses to control volume.  likely the device is muted by default.

The sound control on the TV is the same whether the input is TV or
HDMI(3, here). Would you believe I didn't mute the sound on the TV to
complain there is no sound?

>> > So, one needs to ensure the output is configured correctly.
>>
>> The only relevant configuration I see for sound is under the hardware
>> tab. Anything analog gives an output on the computer, anything digital
>> gives no output. In both cases, there is no output on the TV.

No comment about this? If this is the way to do the configuration,
then you shouldn't suggest I should configure pulseaudio. If it's not
you should correct.
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