[pulseaudio-discuss] pulseaudio cannot recognise ALSA plughw

[Aleksander Kamenik]

Lennart Poettering wrote:

> One thing you might try before you file that bug is commenting the
> invocation of snd_pcm_hw_params_set_periods_integer() in that
> function, recompiling and testing whether that changes the behaviour.

I guess your idea was to include a goto finish; right before the 
problematic code with snd_pcm_hw_params_set_periods_near() by commenting 
the 'if ((ret = snd_pcm_hw_params_set_periods_integer(pcm_handle, 
hwparams)) < 0)' line?

In that case pulseaudio starts up, but doesn't set up any PCM's.

Jan 20 00:12:21 negr pulseaudio[11755]: (alsa-lib)pcm.c: PCM not set up

So there's nowhere to send the playback, no devices except the Null 
Output device are shown in the pulse volume control.

However I also tried commenting out the 
snd_pcm_hw_params_set_periods_near() function calls. Thanks to this my 
USB sound card popped up in the pulse audio volume control. My 
integrated nvidia chip worked.

I could send the output stream to the usb card, though no sound would 
come out nor would the sliders move to indicate playback. Though that 
didn't crash anything and I could transfer the stream back to the built 
in sound chip which works.

But when tried changing the volume of the USB card, pulseaudio crashed.

I did all of this in pavucontrol.

Regards,

-- 

Aleksander Kamenik
System Administrator
Krediidiinfo AS
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