[mythtv-users] Correct setup?

[John Pilkington]

On 26/02/18 09:16, John Pilkington wrote:
> On 25/02/18 21:55, Peter Carlsson wrote:
>> On Sun, Feb 25, 2018 at 09:19:16PM +0000, John Pilkington wrote:
>>> On 25/02/18 20:47, Peter Carlsson wrote:
>>>
>>>>
>>>> I just wanted to give some feedback since you all were so kind to give
>>>> me advice. I think I finally got it all configured but since a few days
>>>> back I have no longer sound on my MythTV :(
>>>>
>>>> So before I can feel 100% confident that the channel scan is successful
>>>> I need to fix the sound issue. Any help on this problem would also be
>>>> appreciated!
>>>
>>>
>>> Hi:  I haven't noticed any comment on this, but I have had a sound 
>>> bug in
>>> the past few days while doing tests that remove some transport 
>>> streams.  On
>>> starting playback it reports something like 'reconfiguring audio 
>>> failed',
>>> shows a big red cross and goes mute.
>>>
>>> It seems that my nvidia card is getting into HDMI2 audio mode.  Sound 
>>> comes
>>> back if I select HDMI instead.  In KDE System Settings that comes in
>>> 'Advanced'
>>
>> Hello!
>>
>> This is the exact same behaviour I experience.
>>
>> I also have a nvidia card but I don't know where to see or change the
>> HDMI1/HDMI2 audio mode?
>>
>> A few days back (22/2) MythTV was updated to 29.1 and also ffmpeg and
>> libav to 3.4.2. Don't know if that can be the cause.
>>
>> Best regards,
>> Peter Carlsson
> 
> Interesting.  I didn't know whether to blame the ffmpeg resync, a newish 
> nvidia driver (390.25, IIRC) or my stream-mangling experiments.  I think 
> it has always been triggered by starting playback of a modified HD 
> DVB-T2 recording (aac/LATM, again IIRC).
> 
> I doubt that Myth has internal settings for it at present;  I have an 
> audio devices widget in my task bar, and also in the KDE 
> plasma-systemsettings audio devices screen.  It doesn't survive reboots.
> 

I'm not sure that the HDMI2 mode is the real problem, although changing 
it does bring sound back.

Frontend setup has two sets of audio tests: one under the Wizard and one 
under Audio.  The Wizard version works for me, but ISTR that the 'Audio' 
version has been mute for some time.

The device that is found is ALSA:hdmi:CARD=NVidia,Dev=1 , but on a 
Rescan under the Audio tag the monitor shows

ALSA: snd_pcm_info_getcard: Operation not permitted
ALSA: snd_pcm_open("sysdefault:CARD=SAA7134") : No such file or directory

and the speaker test fills the monitor screen with:

AddData called with audio framework not initialised

'aplay -l' shows only the NVidia devices HDMI 0 and HDMI 1

 > John