Disregard, further testing in progress.

** Changed in: chromium-browser (Ubuntu)
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/1711754

Title:
  Crackling sound from HTML5 video while routing sound through
  PulseAudio

Status in chromium-browser package in Ubuntu:
  Invalid

Bug description:
  All HTML5 videos watched in Chromium, using PulseAudio as session-wide audio 
daemon, begin to crackle, as if there were audio buffer underruns.
  I began experiencing this problem while watching videos on YouTube, edX, 
Coursera, Udemy.

  Going through all PulseAudio troubleshooting steps (e.g. adding
  tsched=0 to load-module module-udev-detect in /etc/pulse/default.pa,
  etc.) did not work.

  Watching the same videos in Firefox 55.0.2 (which routes all audio
  through PulseAudio) gives perfect sound, no crackling/underruns.

  Hardware: IBM ThinkPad T410s with Intel + NVidia graphics (Optimus - using 
discrete NVidia only)
  OS:     elementary OS 0.4.1 Loki (based on Ubuntu 16.04 LTS)
  Package:  chromium-browser:
    Instalados: 60.0.3112.78-0ubuntu0.16.04.1293
    Candidato:  60.0.3112.78-0ubuntu0.16.04.1293
    Tabla de versión:
   *** 60.0.3112.78-0ubuntu0.16.04.1293 500
          500 http://archive.ubuntu.com/ubuntu xenial-updates/universe amd64 
Packages
          500 http://archive.ubuntu.com/ubuntu xenial-security/universe amd64 
Packages
          100 /var/lib/dpkg/status
       49.0.2623.108-0ubuntu1.1233 500
          500 http://archive.ubuntu.com/ubuntu xenial/universe amd64 Packages

  I switched from Ubuntu 16.04's HWE stack to lts-xenial for stability,
  downgraded kernel from 4.10 to 4.4, problem persists.

  ProblemType: Bug
  DistroRelease: elementary 0.4.1
  Package: chromium-browser 60.0.3112.78-0ubuntu0.16.04.1293 [origin: Ubuntu]
  ProcVersionSignature: Ubuntu 4.4.0-92.115-generic 4.4.76
  Uname: Linux 4.4.0-92-generic x86_64
  NonfreeKernelModules: wl nvidia_uvm nvidia
  ApportVersion: 2.20.1-0ubuntu2.10
  Architecture: amd64
  CrashDB: ubuntu
  CurrentDesktop: Pantheon
  Date: Fri Aug 18 18:46:52 2017
  Desktop-Session:
   'pantheon'
   '/etc/xdg/xdg-pantheon:/etc/xdg'
   '/usr/share/pantheon:/usr/local/share/:/usr/share/'
  DetectedPlugins:
   
  Env:
   'None'
   'None'
  InstallationDate: Installed on 2017-06-01 (78 days ago)
  InstallationMedia: elementary OS 0.4.1 "Loki" - Stable amd64 (20170517)
  Load-Avg-1min: 2.26
  Load-Processes-Running-Percent:   0.5%
  MachineType: LENOVO 2924BV6
  ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.4.0-92-generic 
root=UUID=10947231-e6e4-4324-97e7-ca72701055f8 ro quiet splash vt.handoff=7
  SourcePackage: chromium-browser
  ThirdParty: True
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 10/11/2012
  dmi.bios.vendor: LENOVO
  dmi.bios.version: 6UET70WW (1.50 )
  dmi.board.name: 2924BV6
  dmi.board.vendor: LENOVO
  dmi.board.version: Not Available
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: Not Available
  dmi.modalias: 
dmi:bvnLENOVO:bvr6UET70WW(1.50):bd10/11/2012:svnLENOVO:pn2924BV6:pvrThinkPadT410s:rvnLENOVO:rn2924BV6:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
  dmi.product.name: 2924BV6
  dmi.product.version: ThinkPad T410s
  dmi.sys.vendor: LENOVO
  modified.conffile..etc.default.chromium-browser: [deleted]

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