[mythtv-users] Audio or ALSA bug?

[Douglas Choma]

  I can't tell if this is a bug or if I'm just lame (maybe both?).

I'm running r25379 from trunk.

For my "Audio output device" I've selected "ALSA:iec958:CARD=NVidia,DEV=0"
Speaker configuration: "5.1"
I've also checked Dolby and DTS decoding

And I had (this is the part that drove me crazy) "Use internal volume 
control" checked.  This setting is on the screen after the initial audio 
device settings.

With the "Use internal volume control" active, I would get no audio and 
tons of errors on the frontend...
####
AO: Original codec was AC3, signed 16 bit, 48 kHz, 6 channels
AO: Opening audio device 'iec958:CARD=NVidia,DEV=0' ch 6(6) sr 48000 sf 
signed 16 bit reenc 1
ALSA: Setting IEC958 status: audio
Opening ALSA audio device 'iec958:CARD=NVidia,DEV=0'.
ALSA: SetParameters(format=2, channels=6, rate=48000, 
buffer_time=100000, period_time=50000)
ALSA, Error: Channels count 6 not available: Invalid argument
ALSA, Error: Unable to set ALSA parameters: Invalid argument
AudioOutput Error: Aborting reconfigure
ALSA, Error: getBufferedOnSoundcard() called with pcm_handle == NULL!
ALSA, Error: getBufferedOnSoundcard() called with pcm_handle == NULL!
ALSA, Error: getBufferedOnSoundcard() called with pcm_handle == NULL!
ALSA, Error: getBufferedOnSoundcard() called with pcm_handle == NULL!
... repeats until crash ...
####

As soon as I turned that setting off, audio worked and no more errors.

So my questions...
1) Should it be possible to select settings that cause such serious 
errors (crashes)?  I know the wiki mentions turning that off for digital 
output; but it seems like maybe that setting shouldn't be available if 
it's incompatible with settings on the previous page?
or
2) Do I just have something really wrong with my ALSA configuration?