[mythtv-users] ALSA No Longer Sees Sound Card

[Roger Heflin]

Ben Curtis wrote:
> Hey guys,
> 
> Just rebuilt a new box for my backend, and I can't seem to get sound
> playback working on it.  Everything worked great until I installed the
> capture cards.  After installing the capture cards, it appears to be
> trying to use them as the default sound device, instead of the mobo's
> sound card.  So.. some info:
> 
> "aplay -l" returns nothing.
> "alsamixer" shows:
>   Card: PulseAudio
>   Chip: PulseAudio
>   View: [Playback] Capture  All
> "alsamixer -c 0" shows:
>   Card: Conexant CX8801
>   Chip: CX88│
>   View: [Playback] Capture  All
> "alsamixer -c #" where # is 1-9 don't work at all.
> 
> In KDE when using the sound card detection, it finds my "Intel 82801l
> (ICH9 Family) HD Audio Controller", and appears to be trying to use ALSA
> to run it.  However, aRts crashes at boot, or any time I try to restart
> the sound system.
> 
> I'm stumped as to why "aplay -l" doesn't see the motherboards' sound card.
> 
> Any ideas?
> 
> Thanks,
> Ben
> 
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> 

A couple of things I had to do.

I had to rmmod the capture device before starting X so it would find the correct 
device, I also had to change myth to using /dev/dsp1 (I don't understand why 
/dev/dsp is not there), after that you can put the module for the capture device 
back.

It does appear that the newer alsa are not quite smart enough to figure out that 
a capture device with only inputs should not be the default device, and I was 
unable to figure out a way to actually tell alsa what to use as the default 
device, no matter what you do it does not appear to stay set, even once I get it 
working correctly if the next time it finds the capture device, it messes up the 
same way.

I am using F8, but I had similar problems on F7 when I would start X up with a 
usb camera (with a microphone) already there, it gets found first and used 
instead on the MB audio.

                                Roger