sound problems with latest updates in f8test

[stan]

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.