This bug was fixed in the package pulseaudio - 1:11.1-1ubuntu7.9

pulseaudio (1:11.1-1ubuntu7.9) bionic; urgency=medium

  [Kai-Chuan Hsieh]
  * alsa-mixer: Correct ucm card name (LP: #1881094)

  [Hui Wang]
  * d/p/0901-alsa-solaris-oss-remove-unnecessary-error-handling-w.patch
  * d/p/0902-alsa-Improve-resume-logic-after-alsa-suspend.patch
  * (LP: #1882042)

 -- Kai-Chuan Hsieh <>  Wed, 27 May 2020
16:42:50 +0800

** Changed in: pulseaudio (Ubuntu Bionic)
       Status: Fix Committed => Fix Released

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  [SRU] Linux,Ubuntu,18.4,CI,OLP15,PRTS, Audio/video is out of sync/lag
  when enter Suspend during playback

Status in HWE Next:
Status in pulseaudio package in Ubuntu:
  Fix Released
Status in pulseaudio source package in Bionic:
  Fix Released

Bug description:
  Users reported the audio and video is out of sync when entering suspend 
during playback on bionic.

  The mainline pulseaudio already has the fix for this issue, and the fix is 
already in the eoan, focal and groovy, but it is not in the bionic.

  [Test Case]
  open a online video on the firefox, while it is playing, suspend the system, 
wait for 30 seconds, resume the system, the audio and video is still on the 

  [Potential Regression Risk]
  Low, these 2 patches are already in the mainline pulseaudio, and already in 
the eoan, focal and groovy.

  Most of the change is in the suspend/unsuspend on alsa sink/source, the 
potential regression risk is the playback/recording stops working after
  machine suspend and resume or playback/recording has an obvious discontinuity 
before suspend and after resume. I have done the test on a Lenovo and a Dell 
machine, the playback/recording worked well after resuming.

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