sound problems with latest updates in f8test

[dragoran]

On 8/18/07, stan <eiqep_eiwo_y at cox.net> wrote:
>
> dragoran wrote:
> >
> >
> > On 8/18/07, *stan* <eiqep_eiwo_y at cox.net
> > <mailto:eiqep_eiwo_y at cox.net>> wrote:
> >
> >     Hi,
> >
> >     I have an application that opens the sound card.  With the latest
> >     updates it will still open it as default device but can no longer
> open
> >     it as plughw:0,0.  The error I get is
> >     cannot open audio device "plughw:0,0" (Device or resource busy)
> >
> >     When I run powertop, I see that the driver has a lot of interrupts
> >     even
> >     though there is no sound running.
> >     Top causes for wakeups:
> >       43.9% (100.6)       <interrupt> : ohci_hcd:usb2, eth0
> >       20.5% ( 46.9)       <interrupt> : ICE1724
> >        9.6% ( 22.0)       <interrupt> : libata
> >        6.4% ( 14.6)   at-spi-registry : schedule_timeout
> (process_timeout)
> >        4.6% ( 10.5)                 X : do_setitimer (it_real_fn)
> >        4.4% ( 10.0)   /usr/bin/sealer : schedule_timeout
> (process_timeout)
> >
> >     Perhaps this is normal, but given the device busy error above it
> makes
> >     me suspicious that there is something wrong.
> >
> >     Sound plays normally using audio player, but it uses the default
> >     device.  I notice that the usage drops by about half for ICE1724
> when
> >     the sound is playing.
> >
> >     I'll probably do a debug of this at some point and post any
> findings.
> >
> >
> > that may be related to the pulse audio changes you have to use default
> > to play sound with alsa.
> >
> >
> That isn't good.  Default automatically runs the sound through dmix.
> And it has a set frame rate of
> 48000.  Other rates are software resampled.  I want to avoid that and
> only use the hardware sample rates
> so that there is no resampling on the sound.
>
> Is there a way to configure sound with pulse audio to avoid this, or do
> I have to remove pulse audio in order to
> get direct access to alsa?
>
> Thanks.


try running pasuspend before running your app.
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