[mythtv-users] MythTV 0.24 HDMI audio problem

Jarod Wilson jarod at wilsonet.com
Mon Dec 6 21:38:42 UTC 2010

On Dec 6, 2010, at 9:19 AM, Jean-Yves Avenard wrote:

> Hi Jarod
> On 20 November 2010 17:03, Jarod Wilson <jarod at wilsonet.com> wrote:
>> On Nov 19, 2010, at 8:05 PM, Jean-Yves Avenard wrote:
>>> On 20 November 2010 08:36, Jarod Wilson <jarod at wilsonet.com> wrote:
>>>> sure if its directly related or not, but scanning for audio
>>>> devices tends to always segfault on this box too. Same build
>>>> works just fine on an ion box.
>>> Great, can you put a backtrace on trac ?
>> Yeah, I should be able to do that this weekend. Is there a ticket already
>> opened that I should tack it onto, or shall I open a new one?

Nb: I've tried a few times, albeit only briefly, and have, of course,
been unable to get the box to segfault again, even with the prior
nvidia driver where I swear it did...

>>>> (nVidia 260.19.21 driver, ALSA 1.0.23 kernelspace and userspace).
>>> Did you try the last suggestion of using ALSA:hdmi:CARD=NVidia,DEV=x ?
>> Yep. Still no sound. Silence is NOT golden in this case... ;)
> Well, I received my new audio receiver for my cinema room.
> So the first thing I did was installed the GT220 card in the PC
> (identical one to my other machine)..
> Started.. and ... no sound
> I've finally tracked the issue.
> Following the steps I had written on how to achieve judder-free
> playback, I had totally overridden the EDID with Option "UseEDID"
> "false"
> Well, this is what caused no sound for me.
> I replaced it with:
>    Option "UseEDIDFreqs" "FALSE"
>    Option "UseEDIDDpi" "FALSE"
>    Option "ModeValidation" "NoEdidModes"
> (which according to nvidia is the same), and I get audio ...
> I guess UseEDID disables audio over hdmi as the nvidia drivers aren't
> able to check if the display supports sound.
> (note that without  Option "ExactModeTimingsDVI" "True" , one of my
> custom modelines were working)
> I thought you could be having the same issue

Huh, interesting. Does seem like a possibility. I'll try to poke at
it some one of these nights, if not, then during the holiday break
(which I seem to be looking forward to even more than usual this year).

Thanks for the pointer!

Jarod Wilson
jarod at wilsonet.com

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