[mythtv-users] Audio just quit during playback

[John Pilkington]

On 21/07/10 15:02, Mark Adams wrote:
> On 07/20/2010 05:50 AM, Greg Woods wrote:
>> On Tue, 2010-07-20 at 05:20 -0600, Mark Adams wrote:
>>
>>> The cabling on this setup has the output from the soundcard cabled to my
>>> sound system.
>> Via what type of cables? Are you using analog cables for individual
>> speaker channels, or S/PDIF digital passthrough (optical cable)? Or
>> something else?
>>
>> --Greg
>>
>> It's, I believe, an analog cable -- runs from the audio out on the
>> motherboard to the left and right dvi audio inputs on the tv. The
>> video out is connected via an hdmi cable to the dvi compatible hdmi
>> port on the tv. This has worked well for several years now including
>> 5.1 sound, but as I said, it suddenly quit last night.
>>
>> Mark
>
> ** Bump **
>
> Come one, nobody?
>
> Mark

Well, I get this sort of thing too, and I'm using an Intel HDA MB too - 
although not the same as yours.  You quoted aplay -L, so here's mine:

$ aplay -L
default
     Default
front:CARD=Intel,DEV=0
     HDA Intel, STAC92xx Analog
     Front speakers
surround40:CARD=Intel,DEV=0
     HDA Intel, STAC92xx Analog
     4.0 Surround output to Front and Rear speakers
surround41:CARD=Intel,DEV=0
     HDA Intel, STAC92xx Analog
     4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=Intel,DEV=0
     HDA Intel, STAC92xx Analog
     5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=Intel,DEV=0
     HDA Intel, STAC92xx Analog
     5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=Intel,DEV=0
     HDA Intel, STAC92xx Analog
     7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
iec958:CARD=Intel,DEV=0
     HDA Intel, STAC92xx Digital
     IEC958 (S/PDIF) Digital Audio Output
$

I just use the Analog stereo jack and at some time in the past needed to 
enable the Pulse volume control to get any sound at all.  On starting 
mythfrontend I typically get no sound until I have 'Configured' to use 
the initially unselected alternative from Analog Stereo  or 'Analog 
surround 5.1'.  (I see 13 options and 'off').  Once that's done either 
of these will work (ie make an intelligible noise) until, at random on 
leaving 'Play recordings', I lose sound and the log shows 'Pulse audio 
unable to connect'.  Restarting mythfrontend restarts the cycle.

I also see this sort of thing quite often:

2010-07-21 11:09:59.413 AFD: Opened codec 0x2719180, id(MP2) type(Audio)
2010-07-21 11:09:59.418 Opening audio device 'default'. ch 2(2) sr 48000 
(reenc 0)
2010-07-21 11:09:59.422 Opening ALSA audio device 'default'.
2010-07-21 11:09:59.425 ALSA, Warning: mmap not available, attempting to 
fall back to slow writes.
2010-07-21 11:09:59.496 Mixer unable to find control PCM
2010-07-21 11:09:59.496 Mixer unable to find control PCM

It's infuriating, but it only infuriates me and I really haven't tried 
recently to get to the root of the problem.  So this is just 'me too'. 
Maybe I should get out a USB sound device I have somewhere.

All this is 0.23-fixes, Fedora 12, 64 bit.

John P