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[Bug 1447022] [NEW] CubebUtils from firefox is registered as volume 0, no sound for YouTube html5 videos

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Public bug reported:

When playing YouTube html5 videos, no sound output. It turns out that
CubebUtils from Firefox registers a sink to pulseaudio as volume 0 (no
sound).

$ pactl list
<snip>
Sink Input #25
        Driver: protocol-native.c
        Owner Module: 10
        Client: 72
        Sink: 0
        Sample Specification: float32le 2ch 44100Hz
        Channel Map: front-left,front-right
        Format: pcm, format.sample_format = "\"float32le\""  format.rate = "44100"  format.channels = "2"  format.channel_map = "\"front-left,front-right\""
        Corked: no
        Mute: no
        Volume: front-left: 0 /   0% / -inf dB,   front-right: 0 /   0% / -inf dB
                balance 0.00
        Buffer Latency: 100000 usec
        Sink Latency: 45223 usec
        Resample method: copy
        Properties:
                media.name = "AudioStream"
                application.name = "CubebUtils"
                native-protocol.peer = "UNIX socket client"
                native-protocol.version = "30"
                application.process.id = "6482"
                application.process.user = "nobuto"
                application.process.host = "lifebook"
                application.process.binary = "firefox"
                window.x11.display = ":0"
                application.language = "en_US.UTF-8"
                application.process.machine_id = "a67563f873c74c5af38cfebd54f1e51b"
                application.process.session_id = "c2"
                application.icon_name = "firefox"
                module-stream-restore.id = "sink-input-by-application-name:CubebUtils"

ProblemType: Bug
DistroRelease: Ubuntu 15.04
Package: firefox 37.0+build2-0ubuntu1
ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
Uname: Linux 3.19.0-15-generic x86_64
AddonCompatCheckDisabled: False
ApportVersion: 2.17.2-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/pcmC0D0c:   nobuto     4198 F...m pulseaudio
 /dev/snd/controlC0:  nobuto     4198 F.... pulseaudio
BuildID: 20150328222441
Channel: Unavailable
CurrentDesktop: Unity
Date: Wed Apr 22 17:42:41 2015
EcryptfsInUse: Yes
Extensions: extensions.sqlite corrupt or missing
ForcedLayersAccel: False
IfupdownConfig:
 # interfaces(5) file used by ifup(8) and ifdown(8)
 auto lo
 iface lo inet loopback
IncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite)
InstallationDate: Installed on 2015-02-28 (52 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Alpha amd64 (20150228)
Locales: extensions.sqlite corrupt or missing
Plugins:
 Google Talk Plugin Video Renderer - /opt/google/talkplugin/libnpo1d.so (google-talkplugin)
 iTunes Application Detector - /usr/lib/mozilla/plugins/librhythmbox-itms-detection-plugin.so (rhythmbox-mozilla)
 Google Talk Plugin - /opt/google/talkplugin/libnpgoogletalk.so (google-talkplugin)
PrefSources:
 prefs.js
 user.js
 [Profile]/extensions/eow@xxxxxxxxx/defaults/preferences/eow-prefs.js
 [Profile]/extensions/keysnail@xxxxxxxxxxxxxxx/defaults/preferences/keysnail-prefs.js
Profiles: Profile0 (Default) - LastVersion=37.0/20150328222441 (In use)
RelatedPackageVersions:
 google-talkplugin 5.40.2.0-1
 rhythmbox-mozilla 3.1-1ubuntu3
RunningIncompatibleAddons: False
SourcePackage: firefox
Themes: extensions.sqlite corrupt or missing
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 01/07/2013
dmi.bios.vendor: FUJITSU // Phoenix Technologies Ltd.
dmi.bios.version: Version 1.06
dmi.board.name: FJNB24F
dmi.board.vendor: FUJITSU
dmi.board.version: D2
dmi.chassis.type: 10
dmi.chassis.vendor: FUJITSU
dmi.modalias: dmi:bvnFUJITSU//PhoenixTechnologiesLtd.:bvrVersion1.06:bd01/07/2013:svnFUJITSU:pnFMVS54KR:pvr:rvnFUJITSU:rnFJNB24F:rvrD2:cvnFUJITSU:ct10:cvr:
dmi.product.name: FMVS54KR
dmi.sys.vendor: FUJITSU

** Affects: firefox (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug vivid

-- 
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https://bugs.launchpad.net/bugs/1447022

Title:
  CubebUtils from firefox is registered as volume 0, no sound for
  YouTube html5 videos

Status in firefox package in Ubuntu:
  New

Bug description:
  When playing YouTube html5 videos, no sound output. It turns out that
  CubebUtils from Firefox registers a sink to pulseaudio as volume 0 (no
  sound).

  $ pactl list
  <snip>
  Sink Input #25
          Driver: protocol-native.c
          Owner Module: 10
          Client: 72
          Sink: 0
          Sample Specification: float32le 2ch 44100Hz
          Channel Map: front-left,front-right
          Format: pcm, format.sample_format = "\"float32le\""  format.rate = "44100"  format.channels = "2"  format.channel_map = "\"front-left,front-right\""
          Corked: no
          Mute: no
          Volume: front-left: 0 /   0% / -inf dB,   front-right: 0 /   0% / -inf dB
                  balance 0.00
          Buffer Latency: 100000 usec
          Sink Latency: 45223 usec
          Resample method: copy
          Properties:
                  media.name = "AudioStream"
                  application.name = "CubebUtils"
                  native-protocol.peer = "UNIX socket client"
                  native-protocol.version = "30"
                  application.process.id = "6482"
                  application.process.user = "nobuto"
                  application.process.host = "lifebook"
                  application.process.binary = "firefox"
                  window.x11.display = ":0"
                  application.language = "en_US.UTF-8"
                  application.process.machine_id = "a67563f873c74c5af38cfebd54f1e51b"
                  application.process.session_id = "c2"
                  application.icon_name = "firefox"
                  module-stream-restore.id = "sink-input-by-application-name:CubebUtils"

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: firefox 37.0+build2-0ubuntu1
  ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
  Uname: Linux 3.19.0-15-generic x86_64
  AddonCompatCheckDisabled: False
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/pcmC0D0c:   nobuto     4198 F...m pulseaudio
   /dev/snd/controlC0:  nobuto     4198 F.... pulseaudio
  BuildID: 20150328222441
  Channel: Unavailable
  CurrentDesktop: Unity
  Date: Wed Apr 22 17:42:41 2015
  EcryptfsInUse: Yes
  Extensions: extensions.sqlite corrupt or missing
  ForcedLayersAccel: False
  IfupdownConfig:
   # interfaces(5) file used by ifup(8) and ifdown(8)
   auto lo
   iface lo inet loopback
  IncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite)
  InstallationDate: Installed on 2015-02-28 (52 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Alpha amd64 (20150228)
  Locales: extensions.sqlite corrupt or missing
  Plugins:
   Google Talk Plugin Video Renderer - /opt/google/talkplugin/libnpo1d.so (google-talkplugin)
   iTunes Application Detector - /usr/lib/mozilla/plugins/librhythmbox-itms-detection-plugin.so (rhythmbox-mozilla)
   Google Talk Plugin - /opt/google/talkplugin/libnpgoogletalk.so (google-talkplugin)
  PrefSources:
   prefs.js
   user.js
   [Profile]/extensions/eow@xxxxxxxxx/defaults/preferences/eow-prefs.js
   [Profile]/extensions/keysnail@xxxxxxxxxxxxxxx/defaults/preferences/keysnail-prefs.js
  Profiles: Profile0 (Default) - LastVersion=37.0/20150328222441 (In use)
  RelatedPackageVersions:
   google-talkplugin 5.40.2.0-1
   rhythmbox-mozilla 3.1-1ubuntu3
  RunningIncompatibleAddons: False
  SourcePackage: firefox
  Themes: extensions.sqlite corrupt or missing
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 01/07/2013
  dmi.bios.vendor: FUJITSU // Phoenix Technologies Ltd.
  dmi.bios.version: Version 1.06
  dmi.board.name: FJNB24F
  dmi.board.vendor: FUJITSU
  dmi.board.version: D2
  dmi.chassis.type: 10
  dmi.chassis.vendor: FUJITSU
  dmi.modalias: dmi:bvnFUJITSU//PhoenixTechnologiesLtd.:bvrVersion1.06:bd01/07/2013:svnFUJITSU:pnFMVS54KR:pvr:rvnFUJITSU:rnFJNB24F:rvrD2:cvnFUJITSU:ct10:cvr:
  dmi.product.name: FMVS54KR
  dmi.sys.vendor: FUJITSU

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