Opening reader mode causes audio distortion in all other tabs

[Corwin Harris]

Description: Ubuntu 18.10
Release: 18.10

firefox:
  Installed: 64.0+build3-0ubuntu0.18.10.1
  Candidate: 64.0+build3-0ubuntu0.18.10.1
  Version table:
 *** 64.0+build3-0ubuntu0.18.10.1 500
        500 http://us.archive.ubuntu.com/ubuntu cosmic-updates/main amd64 Packages
        500 http://security.ubuntu.com/ubuntu cosmic-security/main amd64 Packages
        100 /var/lib/dpkg/status
     63.0+build1-0ubuntu1 500
        500 http://us.archive.ubuntu.com/ubuntu cosmic/main amd64 Packages

Hardware
--------
Motherboard: ASRock X399 Taichi
Processor: AMD Threadripper x1900
Video Card: Nvidia GTX 1080
Audio Chipset: Realtek ALC1220

Expectation: Opening reader mode has no audio side effects.

Actual: Occasionally when opening reader mode from any tab all audio in any other tab will crackle and pop until Firefox is restarted. Issue can be replicated in safe mode as well.

[Corwin Harris (teh-corwiz)]

Effect also observed if tab begins playing audio after reader mode is opened.

[Corwin Harris (teh-corwiz)]

Observed that effect seems to resolve if audio/video is stopped for a short while (~5 minutes in this case).

[Paul White (paulw2u)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. We are sorry that we do not always have the capacity to look at all reported bugs in a timely manner. You reported this bug some time ago and there have been many changes in Ubuntu since that time. Your problem may have been fixed with some of the updates.

Ubuntu 18.10 (cosmic) reached end-of-life on July 18, 2019.

It would help us a lot if you could test on a currently supported Ubuntu version. When you test it and it is still an issue, kindly upload the updated logs by running only once in a terminal:

apport-collect 1813170

and then change the status of the bug back to "New".

Please add any additional information that you think might be relevant. Alternatively, please confirm that this is no longer a problem and that we can close the bug report. If we do not hear from you this bug report will expire in approximately 60 days time.

Thank you again
Paul White
[Ubuntu Bug Squad]

[Launchpad Janitor (janitor)]

[Expired for firefox (Ubuntu) because there has been no activity for 60 days.]