[mythtv-users] audioinputalsa.cpp:336 (AlsaBad) AudioInALSA(default:CARD=CA0106): pcm open failed: Invalid argument

[HP-mini]

On Tue, 2013-05-28 at 16:40 -0400, Dave Matthews wrote:
> 
> 
> On Tue, May 28, 2013 at 4:22 PM, HP-mini  wrote:
>         On Mon, 2013-05-27 at 17:21 -0400, Dave Matthews wrote:
>         > On Mon, May 27, 2013 at 3:52 PM, HP-mini
>         > wrote:
>         >         On Mon, 2013-05-27 at 14:08 -0400, Dave Matthews
>         wrote:
>         >         > Let try this with a subject.
>         >         >
>         >         > Also - the machine upgraded from MythTV 0.24 to
>         0.25 when
>         >         the Ubuntu
>         >         > upgrade happened.

>  
> The rescan gave me a list of device names to try. I had already looked
> at it.  The audio is coming from an external device (Dish Network Sat
> receiver).
>  
>  
 
>         
>         
>         >         Can try a test with varied listed "arecord -L"
>         devices
>         >          arecord -D hw:CARD=CA0106 -r 48000 -f S16_LE -c 2
>         -d 5 -t wav
>         >         test.wav
>         
>         >
I was not suggesting to edit the returned devices..
> I wasn't editing.  This was going through the list of possible options
> for the audio device line in teh backend setup.
>  
>         
>         Do you use the soundcard for audio output (as well) ?
> Yes, it was working.
>  
>         
>         > Snip of FE setup
>         > htpc at htpc:/usr/bin$ mythfrontend
>         > - clipped
>         > 2013-05-27 16:58:23.296609 I  MythCoreContext: Connecting to
>         backend
>         > server: 192.168.1.6:6543 (try 1 of 1)
>         > 2013-05-27 16:58:23.297619 I  Using protocol version 72
>         > 2013-05-27 16:58:23.339962 I  Bonjour: Service registration
>         complete:
>         > name 'Mythfrontend on htpc' type '_mythfrontend._tcp.'
>         domain:
>         > 'local.'
>         > 2013-05-27 16:58:38.404682 E  ALSA: snd_pcm_info_get_card:
>         Operation
>         > not permitted
>         > 2013-05-27 16:58:38.705783 I  Pulse: PulseAudio suspend OK
>         > 2013-05-27 16:58:38.862827 E  ALSA: snd_pcm_info_get_card:
>         Operation
>         > not permitted
snip
>         > snd_pcm_open("sysdefault:CARD=CX8801"): No such file or
>         directory
>         > 2013-05-27 16:58:49.522759 I  Pulse: PulseAudio resume OK
>         > 2013-05-27 16:58:56.054864 I  Received remote 'Clear Cache'
>         request
>         > 2013-05-27 16:58:59.469800 I  Bonjour: De-registering
>         service
>         > '_mythfrontend._tcp.' on 'Mythfrontend on htpc'
>         > 2013-05-27 16:58:59.470311 I  RAOP Device: Cleaning up.
>         > 2013-05-27 16:58:59.470342 I  AirPay: Cleaning up.
>         > 2013-05-27 16:58:59.470371 I  Pulse: Cleaning up
>         PulseHandler
>         > 2013-05-27 16:58:59.470640 I  Deleting UPnP client...
>         > 2013-05-27 16:59:00.302544 I  Waiting for threads to exit.
>         > htpc at htpc:/usr/bin$

>         Not sure what to make of that..
>         Those dmix & dsnoop devices must be automatically generated
>         for audio
>         devices with hardware mixers..
>  
> I think that I have come to the conclusion that Ubuntu's method of
> sticking pulse in front of alsa is the problem and that tools like
> alsa-mixer and gnome-alsamixer are ignored and the pulse default is
> used.
>  

AFAIK They still work..

>         Is your mythtv user a member of the audio group?
> I didn't check it but would assume such due too being able to play old
> recordings. 
>  
Just a longshot..people run mythfrontend as different users..

>         Sorry I assumed it was obvious that "arecord ...file.wav" was
>         going to
>         attempt to record from some device to a file.
>  
> It was obvious.  
>  
Thought so, just checking..

>         Did you try to play the recorded wav file (not mythtv) with
>         aplay?
>  
> I used VLC because I had it.

That's fine as long as the audio playback is working with audio
configured in VLC.


> I think I know how to make Ubuntu do what I want it to do now.  It was
> a matter of figuring out what they were doing with pulse as the
> default sound system.  I didn't have time to fix it last night.

I've never found problems with pulse & mythtv on various *buntu. 
AFAIU Mythtv uses alsa directly by suspending the pulse sound server
(unless you select a pulse device), your log shows this working.
MythTV does not use the system wide pulse audio defaults.

Possibly your defined alsa "default" input & output devices have changed
because of the new setup including video card audio devices.