dragoran wrote:
On 8/18/07, *stan* <eiqep_eiwo_y@xxxxxxx
<mailto:eiqep_eiwo_y@xxxxxxx>> 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.
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