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https://bugs.launchpad.net/bugs/1403938

Title:
  Sound problem with firefox

Status in firefox package in Ubuntu:
  Confirmed

Bug description:
  I'm using Ubuntu on more than half a dozen machines. Only on one of
  these machines I had the problem, that I did not hear sound when
  playing videos with firefox, although the sound on that machine works
  (e.g. when watchting the same videos with mplayer from command line.)

  Which caused me a lot of headache and debugging time.

  I'fe finally found the problem. I need to use pavucontrol or pacmd ,
  then identify the input stream from firefox (a firefox logo and named
  as CubebUtils , and set the volume from 0 to 100% or do something like

  pacmd set-sink-input-volume 1 65535

  where 1 is the input number determined with e.g. pacmd list

  
  So it seems as if the sound driver of firefox lacks a proper volume setting, which might not cause any problems with most sound cards, however, my sound card (or it's driver) has a volume of 0. 

  % lspci | fgrep Audio
  00:1b.0 Audio device: Intel Corporation 6 Series/C200 Series Chipset Family High Definition Audio Controller (rev 05)

  
  regards

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: firefox 34.0+build2-0ubuntu0.14.04.1
  ProcVersionSignature: Ubuntu 3.13.0-43.72-generic 3.13.11.11
  Uname: Linux 3.13.0-43-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl zcommon znvpair
  AddonCompatCheckDisabled: False
  ApportVersion: 2.14.1-0ubuntu3.5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  hadmut     3307 F.... panel-12-mixer
                        hadmut     3316 F.... pulseaudio
   /dev/snd/pcmC0D0p:   hadmut     3316 F...m pulseaudio
  BuildID: 20141127111021
  CRDA: Error: [Errno 2] Datei oder Verzeichnis nicht gefunden: 'iw'
  Channel: Unavailable
  CurrentDesktop: XFCE
  Date: Thu Dec 18 16:54:17 2014
  Extensions: extensions.sqlite corrupt or missing
  ForcedLayersAccel: False
  IncompatibleExtensions: Unavailable (corrupt or non-existant compatibility.ini or extensions.sqlite)
  InstallationDate: Installed on 2014-08-06 (133 days ago)
  InstallationMedia: Ubuntu-Server 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.3)
  IpRoute:
   default via 192.168.164.1 dev p5p1 
   169.254.0.0/16 dev p5p1  scope link  metric 1000 
   192.168.164.0/24 dev p5p1  proto kernel  scope link  src 192.168.164.100 
   192.168.200.0/24 dev vlan0  proto kernel  scope link  src 192.168.200.1
  Locales: extensions.sqlite corrupt or missing
  Plugins:
   Windows Media Player Plug-in - /usr/lib/mozilla/plugins/gecko-mediaplayer-wmp.so (gecko-mediaplayer)
   RealPlayer 9 - /usr/lib/mozilla/plugins/gecko-mediaplayer-rm.so (gecko-mediaplayer)
   QuickTime Plug-in 7.6.9 - /usr/lib/mozilla/plugins/gecko-mediaplayer-qt.so (gecko-mediaplayer)
   DivX Browser Plug-In - /usr/lib/mozilla/plugins/gecko-mediaplayer-dvx.so (gecko-mediaplayer)
   mplayerplug-in is now gecko-mediaplayer 1.0.8 - /usr/lib/mozilla/plugins/gecko-mediaplayer.so (gecko-mediaplayer)
  PrefSources: prefs.js
  Profiles: Profile0 (Default) - LastVersion=34.0/20141127111021 (In use)
  RelatedPackageVersions: gecko-mediaplayer 1.0.8-4ubuntu1
  RfKill:
   0: phy0: Wireless LAN
   	Soft blocked: no
   	Hard blocked: no
  RunningIncompatibleAddons: False
  SourcePackage: firefox
  Themes: extensions.sqlite corrupt or missing
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 10/12/2012
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: H61TIW08.111
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: H61H2-TI2
  dmi.board.vendor: Medion
  dmi.board.version: 1.0
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: Medion
  dmi.chassis.version: 1.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrH61TIW08.111:bd10/12/2012:svnMedion:pnG24:pvr1.0:rvnMedion:rnH61H2-TI2:rvr1.0:cvnMedion:ct3:cvr1.0:
  dmi.product.name: G24
  dmi.product.version: 1.0
  dmi.sys.vendor: Medion

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