[mythtv-users] No ALSA audio in MythTV

[David Parker]

Thanks for the replies, you led me in the right direction and I got it
fixed.

The "Rescan" button in the GUI was giving the "inval8d snd can not be used"
error.  I had been checking the backend logs (which showed nothing), but
the frontend log showed that ALSA support was not compiled in.  Must have
been 100% my fault.  In my haste to get this box working, I must have
compiled MythTV before the ALSA libraries were installed.  That's
embarrassing.

I recompiled and now I have sound working through the speaker output,
patched to the audio input on my TV.  That's good enough for now.  I have
still not been able to get the DisplayPort audio working, even when setting
the radeon driver option "audio" to 1.

Thanks!
Dave
On Jan 30, 2016 2:20 PM, "HP-mini" <blm-ubunet at slingshot.co.nz> wrote:

> On Fri, 2016-01-29 at 23:19 -0500, David Parker wrote:
> > Hello,
> >
> >
> > I've run into a new issue on my newest MythTV box.  This is on Debian
> > Linux 8 (64-bit), with MythTV compiled using the default options.  The
> > PC has a DisplayPort output capable of audio, but ALSA doesn't seem to
> > see it.  So I've been trying to fall back to the analog audio output
>
> <snip>
>
> > The headphone/speaker output of the PC is connected to the audio input
> > of the TV.  When I use speaker-test, I get test sounds from the TV
> > speakers.  However, no matter what I enter as the audio output in
> > MythTV (Setup > Audio) I get an error saying the specified output "is
> > invalid and can not be used."  I have tried:
>
> <snip>
> >
> > No matter what I do, MythTV says the specified output is invalid.  But
> > speaker-test shows that ALSA does indeed work.  Any help would be
> > greatly appreciated.
> >
> >
> > Also, any thoughts on the DisplayPort issue would be greatly
> > appreciated, too, although it's not too important if I can get the
> > analog output working.
> >
> >
> >     Thanks!
> >     Dave
> > ___________________
>
> Instead of trying to find the correct incantation just use the FE audio
> setup rescan & then just pick from the drop-down box.. If it is not
> listed then it not likely to work.
> MythTV audio setup also has a 'speaker-test' feature.
> Is the mythtv BE user "mythtv" a member of the audio group?
> Do FE logs show any clues when running audio setup tool?
>
> If the DP audio codec is missing then could be kernel or video driver.
> The alsa website has a useful "alsainfo.sh" script.
> Does the radeon driver still need a kernel boot option for HDMI/DVI/DP
> audio ?
>
>
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