** Changed in: oem-priority
       Status: In Progress => Fix Released

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https://bugs.launchpad.net/bugs/1887610

Title:
  [SRU]There is no available audio entry in sound settings after execute
  suspend in 'Performance mode'

Status in HWE Next:
  New
Status in OEM Priority Project:
  Fix Released
Status in pulseaudio package in Ubuntu:
  Fix Released
Status in pulseaudio source package in Bionic:
  In Progress
Status in pulseaudio source package in Eoan:
  Won't Fix
Status in pulseaudio source package in Focal:
  Fix Released
Status in pulseaudio source package in Groovy:
  Fix Released

Bug description:
  [Impact]
  On some I+N machines (inlcuding lenovo and dell machines), after
  setting the graphic mode to perofermance mode, and open the gnome
  sound seting, run suspend/resume test, the audio devices will
  disappear from UI, instead a dummy audio shows on the UI, and from
  then on, the audio can't work anymore.

  [Fix]
  The root cause is after resuming, the pulseaudio try to recover the
  PCM device, but at that moment, the devices nodes at /dev/snd/ are
  not accessible yet sometimes, it will make snd_pcm_open fail and
  the pulseaudio will calll unload_module to unload alsa audio card.
  I cherrpicked a fix from upstream, the fix adds retry and pa_msleep(),
  this will retry the snd_pcm_open() a couple of times if it fails.

  [Test Case]
  Install the pulseaudio wit this fix, set the graphic mode to
  performance mode, open the sound setting, then run suspend/resume 90
  times, after test check the audio devices on the UI, the speaker,
  digital mic are still on the UI, and they could work well.

  [Regression Risk]
  Low, this SRU just add retry and pa_msleep(), if the snd_pcm_open()
  doesn't fail, this patch will not introduce any change, if snd_pcm_open()
  fails, it just retry a couple of times, so it will not introduce the
  regression in theory.

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