On Thu, Sep 29, 2011 at 8:32 AM, Takashi Iwai <tiwai@suse.de> wrote:
At Thu, 29 Sep 2011 08:22:39 -0400,
Robert Krakora wrote:
>
> On Thu, Sep 29, 2011 at 2:36 AM, Takashi Iwai <tiwai@suse.de> wrote:
>
> > At Wed, 28 Sep 2011 12:29:05 -0400,
> > Robert Krakora wrote:
> > >
> > > Hi All,
> > >
> > > I am using ALSA 1.0.24 with the attached asound.conf.  I am attempting to
> > > share (mix) the analog output between Asterisk and aplay.  However, when
> > > Asterisk is running, my application throws an error when attempting to
> > play
> > > a wave file via aplay.  If I stop Asterisk, aplay plays the wave file
> > just
> > > fine.  If I remove the asound.conf file, Asterisk and aplay are both
> > happy
> > > and share the analog output just find with the default ALSA dmix
> > > implementation.  However, we need this asound.conf to work for us for
> > other
> > > reasons.  What is wrong with it.  I have even tried replacing dmix with
> > > dshare and get the same bad behavior.  We are running CentOS 6.0.  As a
> > > caveat, I am attempting to use dmix with analog audio.  If I use it with
> > > HDMI audio, it works flawlessly (same asound.conf with tweek to specify
> > > HDMI).  Thanks in advance for your help.
> > >
> > > [root@devkrakorar snd]# su silentm -c "aplay -Dplug:dmixer
> > > /usr/share/sounds/alsa/Front_
> > > Center.wav"
> > > ALSA lib pcm_hw.c:1293:(snd_pcm_hw_open) open '/dev/snd/pcmC0D0p' failed
> > > (-22): Invalid argument
> > >
> > > ALSA lib pcm_dmix.c:1068:(snd_pcm_dmix_open) unable to open slave
> > > aplay: main:660: audio open error: Invalid argument
> > > [root@devkrakorar snd]#
> >
> > Looks like the open of HD-audio stream failed by some reason.
> > When you open via aplay, is the corresponding stream already opened
> > by another?  Take a look at /proc/asound/card0/pcm0p/sub0/* files.
> >
> > Also, try the latest alsa-driver snapshot in
> >   ftp://ftp.suse.com/pub/people/tiwai/snapshot/
> >
> >
> > Takashi
> >
>
> Hi Takashi,
>
> Thanks for the quick response.  Yes, the HD-audio stream open fails because
> Asterisk has previously opened it.  aplay cannot open it (error -22).

-22 is -EINVAL, and it's not -EBUSY or -EAGAIN.  If a blocking open is
the problem, it should have been -EAGAIN or such.
That is, usually something conflicts with the opened stream.


Takashi

Hi Takashi,

You are the man!  Your latest drivers have eliminated this issue!  What did you have to change to fix this?

Best Regards,

--
Rob Krakora
MessageNet Systems
101 East Carmel Dr. Suite 105
Carmel, IN 46032
(317)566-1677
Ext 212
(317)663-0808 Fax