[mythtv-users] Assistance with digital audio configuration requested
Joseph Fry
joe at thefrys.com
Mon Aug 19 23:50:35 UTC 2013
I am a bit confused.... are you saying that plugging in your
headphones mutes the HDMI in windows, but not in Ubuntu?
On Mon, Aug 19, 2013 at 6:50 PM, Daryl McDonald <darylangela at gmail.com> wrote:
>
>
>
> On Mon, Aug 19, 2013 at 5:51 PM, Mike Perkins <mikep at randomtraveller.org.uk>
> wrote:
>>
>> On 19/08/13 20:52, John Nissley wrote:
>>>
>>> On Fri, 2013-08-16 at 14:28 -0700, Karl Newman wrote:
>>>>
>>>> On Fri, Aug 16, 2013 at 1:10 PM, Joseph Fry <joe at thefrys.com> wrote:
>>>> On Fri, Aug 16, 2013 at 4:02 PM, John Nissley
>>>> <jnissley at nissley.org> wrote:
>>>> > I am running close to the latest trunk of mythtv and for the
>>>> last few
>>>> > months I have been having some interesting challenges with
>>>> digital
>>>> > audio.
>>>> > I am running Fedora 18 and an intel CPU with intel graphics
>>>> and sound
>>>> > drivers. A few months ago the digital sound stopped going
>>>> out through
>>>> > my spdif connector and started going through my DVI
>>>> connector that is
>>>> > connected with a DVI to HDMI connector to my TV. My TV has
>>>> a spdif out
>>>> > but it only works for TV stations the TV tunes and not sound
>>>> coming in
>>>> > from an HDMI port. I am trying to get the digital sound to
>>>> go through
>>>> > my SPDIF connection so I can get it to my tuner.
>>>> > Can anyone point me in the direction to get this resolved?
>>>> > Many thanks..
>>>>
>>>>
>>>> If the sound is being carried VIA the graphics cable, then
>>>> most likely
>>>> you have two sound devices in your system. One is probably a
>>>> standard
>>>> Intel or Realtek HDA hosting your spdif. The other is likely
>>>> associated with your video card. In mythtv's playback menus,
>>>> make
>>>> sure that your explicitly telling it to use the standard sound
>>>> card,
>>>> not the video card.
>>>>
>>>> There was also a change to ALSA in kernel 3.8 which broke S/PDIF. It
>>>> was about device numbering or something. It was broken in favor of
>>>> fixing HDMI sound, but I think a newer version of alsa-lib can fix it,
>>>> but you'd need to re-scan in myth. It may not solve your problem, but
>>>> it might be something worth exploring.
>>>>
>>>>
>>>> Karl
>>>>
>>> Thanks for your response. I am on kernel version 3.10.7-100 fc18 and my
>>> alsa lib is alsa-lib-1.0.26-2.fc18.x86_64. Do you have any idea if this
>>> is the offending lib version and if so what is the best way to replace
>>> it with a new one. I have even tried installing a stand alone PCI sound
>>> card just to make sure it was not in internal motherboard issue and
>>> still no success. I have basically tested with all available sound
>>> outputs that mythtv give me and found that only the HDMI and analog
>>> outputs work.
>>>
>> Despite the electrical match between DVI and HDMI, I don't believe that a
>> DVI interface will carry sound. You have to be HDMI end to end for that to
>> work.
>>
>> --
>>
>> Mike Perkins
>>
>>
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>
>
> May I piggy-back a related question here? On my FE/BE dual boot, I have to
> unplug the cord from the headphone jack on the PC to get audio on Windows,
> (it can stay plugged into the TV) and plug it back in for Ubuntu. I have
> HDMI out of PC and HDMI into TV. Audio should work on the HDMI for both
> scenario's shouldn't it?
>
> Daryl
>
>
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