I've updated the description with more details about the issues this
causes so we can evaluate better a solution.

Steve, any official news?

** Description changed:

  Steps to reproduce:
  
  Run both of these at the same time:
  gst-launch-0.10 audiotestsrc ! pulsesink
  gst-launch-0.10 audiotestsrc ! alsasink
  
  If your default sound device does not support hardware mixing, the
  second command will fail. ALSA cannot use the device while PulseAudio is
  using it, and this affects a lot of applications.
  
  Note that if you run the commands the other way around, alsalib will use
  dmix, and then so will pulseaudio, so there is not as much of a problem
  this way around (except for the fact that dmix and PA are doing the same
  job, and you can not control the ALSA-using apps' volumes and routing
  with PA.)
  
  
  Resolution:
  
  Follow http://pulseaudio.org/wiki/PerfectSetup#ALSAApplications
  i.e. install /etc/asound.conf with:
  
  pcm.pulse {
      type pulse
  }
  ctl.pulse {
      type pulse
  }
  pcm.!default {
      type pulse
  }
  ctl.!default {
      type pulse
  }
  
- Note, too, that there are some applications that fail with ALSA->Pulse,
- in particular, SDL seems to hang with Neverball. These bugs can be
- addressed seperately in due course.
+ Note, too, that there are some applications that fail with ALSA->Pulse:
+ 
+ SDL seems to hang with neverball, but that is fixed by installing the 
PulseAudio backend for SDL (libsdl1.2debian-pulseaudio), which will replace the 
default ALSA backend.
+ WINE has its own issues with regards to device selection, which I don't know 
a remedy for.
+ Skype also has its own problems, but these aren't fixable by us and should 
not block us, though should be given some consideraton.

-- 
Default ALSA device must use PulseAudio, otherwise ALSA applications may fail
https://bugs.launchpad.net/bugs/198453
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