Re: Alsa v1.0.12rc1 Realtek ALC260 PCM missing at boot

[Takashi Iwai <tiwai@suse.de>]

At Tue, 27 Jun 2006 15:22:30 +0100,
Barry Scott wrote:
> 
> Takashi Iwai wrote:
> > At Tue, 27 Jun 2006 15:12:46 +0100,
> > Barry Scott wrote:
> >   
> >> Takashi Iwai wrote:
> >>     
> >>> At Tue, 27 Jun 2006 12:54:05 +0100,
> >>> Barry Scott wrote:
> >>>   
> >>>       
> >>>> I'm using 21.6.17.1 with v1.0.12rc1 drivers, libs and utils on FC4.
> >>>> alsamixer reports that the Chip is Realtek ALC260.
> >>>>
> >>>> Both amixer and alsamixer show that the PCM control is missing after 
> >>>> booting.
> >>>> After playing a wav file with aplay the PCM control shows up in both
> >>>> amixer and alsamixer.
> >>>>
> >>>> Is there something I need to configure or is this a bug in1.0.12rc1?
> >>>>     
> >>>>         
> >>> The PCM volume is added dynamically by alsa-lib softvol plugin.
> >>> Usually your system stores/restores the mixer status so that the PCM
> >>> volume reappears again at the next boot.
> >>>
> >>>
> >>> Takashi
> >>>   
> >>>       
> >> What is it that I need to setup to turn on the PCM? The "system" is me 
> >> and this
> >> is a new setup requirement that I have not seen before.
> >>     
> >
> > "alsactl store" at shutdown and "alsactl restore" at boot will recover
> > the last mixer status.  This also automatically recovers the
> > user-space element like "PCM".
> >
> > How the call of alsactl is implement depends on the distro.
> > (E.g. via udev or init script or modprobe hook)
> >
> >
> > Takashi
> >   
> The piece of information I'm missing is how to add PCM in the first place.
> What command do I need to issue to add PCM?

Play something :)  Even the below

	aplay </dev/null

would be enough (although aplay tells an error).

More exactly, when you call snd_pcm_open() with "default" PCM device,
it'll be added.


Takashi

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