[mythtv-users] MythTV 0.24 HDMI audio problem

[Greg Oliver]

On Fri, Nov 19, 2010 at 3:36 PM, Jarod Wilson <jarod at wilsonet.com> wrote:
> On Nov 19, 2010, at 4:00 PM, Jean-Yves Avenard wrote:
> ...
>>> what's more annoying is that I can't get AC3/DTS passthrough for any
>>> of the devices.
>>>
>>
>> I had a talked about this.
>> And depending on the version of ALSA you are using, the device
>> information you should enter in myth is either;
>>
>> 1)With a recent kernel (not sure which version it started from) and a
>> version of ALSA-lib containing this change:
>> http://git.alsa-project.org/?p=alsa-lib.git;a=commitdiff;h=e6d5dcf1f625984605d362338d71162de45a6c60
>>
>> ALSA:hdmi:CARD=YourCardName,DEV=id
>>
>> YourCardName being what's returned by a play -L like: NVidia
>> id: being one of the number device used by the hdmi port
>>
>> Or:
>> 2)Define an alias in ALSA
>> like mythtv_hdmi:CARD=foo,DEV=x that link to
>> intel hda, allowing the use of the extra DEVs when the system alsa-lib
>> doesn't have the above patch..
>> and use ALSA:mythtv_hdmi in the myth audio configuration.
>>
>> Uncheck the advanced audio bit and force of passthrough.
>>
>> I'll get myself a GT220 and see how it goes. Hopefully will find a way
>> to make all of this a bit easier to configure.
>
> It looks to me like a lot of the blame goes to alsa support for
> these cards being crap. I've tried damned near every suggestion
> here and on that xbmc page and misc other things, and I still
> cannot get a peep out of the hdmi connection on my GT220 with

I had a very rough time with my first GT220.  It was motherboard
related (intel board) and due to disabling the onboard audio in the
bios.  While it was showing up to alsa, I never got sound.  After
about 3 hours or so,  I starting looking at the PCI bus, and noticed
even though the onboard was bios disabled, it was still being
enumerated and given an IRQ, etc..  Although alsa could not see it
completely.  Once I enabled the onboard, it and the gt220 showed up,
and the GT220 worked on devices 7 and 9.  Once I played something on 7
or 9, then 3 would work, but only after playing out 7 or 9..

> *any* application -- not aplay, not mplayer, not mythtv... Not
> 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.
>
> (nVidia 260.19.21 driver, ALSA 1.0.23 kernelspace and userspace).
>
> --
> Jarod Wilson
> jarod at wilsonet.com
>
>
>
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