Re: no hdmi audio on older tv

[Jiri Vanek]

On 10/30/18 6:23 PM, stan wrote:
>  On Tue, 30 Oct 2018 13:41:50 +0100
>  Jiri Vanek <jvanek(a)redhat.com&gt; wrote:
>  
>  I'm not familiar with hdmi, but I'll try to give you some ideas.
>  
> > I have f29 (ernel kernel-4.18.12-300.fc29  ) on  machine, which is
> > changing its place from time to time - between two TVs. Old, and
> > older:)
> >
> > Both are connected by HDMI. Video output is fine, even acceleration
> > is working,  but sound work only on newer of those two.
> >
> > I don't know if this is regression, because this machine replaced 32b
> > rapbery2 with kodi, which was working without issues on both TVs (but
> > was eaten by (not mine) dog)
>  
>  Can you try an older version of the kernel?  Or alsa?  It sure sounds
>  like a regression, but the audio information doesn't support that.  Just
>  a check to be sure. 
sure. will do. Just will tak e abit longer.
>  
> >
> > I was following
> > https://fedoraproject.org/wiki/How_to_debug_sound_problems but had
> > not found much:
> >  - with removed pulseaudio, the aplay -vv segfaults
> >      - I really on pulseaudio anyway, as I need to transfer sound to
> > this machine over network
> >
> >  - the diff of alsa-info.sh's is really minimal [1], only
> > [cite]
> > state.vc4hdmi {
> > 	control.1 {
> > 		iface PCM
> > 		name ELD
> > 		value '100007006712000100000000000000004c2d9d02
> > for non working and
> > 		value '100007006712000100000000000000004c2d9b03
> > for working
> > [/cite]
>  
>  If alsa didn't know about the interface for the failing device, it
>  wouldn't be able to specify a control.  Are there any warnings or
>  errors in the journal during boot, or when trying to play?  
> >
> >   - when alsamixer is opened, then the default looks like working,
> > and the job on old tv; but not do nothing older tv.
> >   - when alsamixer -c0 is opened, then the  vc4-hdmi reports no
> > control for selected device for *both* tvs (which is same as f6 and
> > selecting vc4-hdmi)
> >
> > Does anybody have a clue what to try?
>  
>  Great troubleshooting report, very complete.
>  
>  Is it possible that you changed a setting on the older TV that isn't
>  working?  Because, like you said, it *should* be working. 
nope. both raspbian and kodi still keeps playing.
>  
>  What happens if you just use an audio player to send only audio to the
>  older TV from the command line?  Maybe try such with debugging enabled.
>  Or look in the logs to see if it complains about anything.
>  
>  e.g. mplayer -vv [audio-file]
>  or
>  mplayer -vv -novideo [video-file] 
I play only from commandline - aplay - and it prints no otput. it behaves corrctly as if
it s been
playing.  Will try to get more debug output here.
>  
>  Since the hdmi is the only device, it should route to the TV to play.
>  I think.
>  
>  If there are no errors and it acts like it is playing, that really
>  points to the older TV having an issue.
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-- 
Jiri Vanek
Senior QE engineer, OpenJDK QE lead, Mgr.
Red Hat Czech
jvanek(a)redhat.com    M: [phone]