Thank you for reporting this bug to Ubuntu. Ubuntu 12.04 (precise) reached end-of-life on April 28, 2017.
See this document for currently supported Ubuntu releases: https://wiki.ubuntu.com/Releases We appreciate that this bug may be old and you might not be interested in discussing it any more. But if you are then please upgrade to the latest Ubuntu version and re-test. ** Changed in: pulseaudio (Ubuntu) Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to pulseaudio in Ubuntu. https://bugs.launchpad.net/bugs/1157465 Title: headphone output garbled for movie players (more...) Status in pulseaudio package in Ubuntu: Incomplete Bug description: Not sure when this started but recently when I plug in my headphones the sound output becomes garbled but only for movie players (vlc / dragon). Sound is OK for amarok but switches to mono (pavucontrol appears to think it is stereo but the sound output is mono (yes the headphones are stereo!)). This definitely worked previously (kubuntu 12.04) and i think, but cannot be sure, that the problem started after recent updates. --- AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. ApportVersion: 2.0.1-0ubuntu17.1 Architecture: amd64 ArecordDevices: **** List of CAPTURE Hardware Devices **** card 0: PCH [HDA Intel PCH], device 0: Cirrus Analog [Cirrus Analog] Subdevices: 1/1 Subdevice #0: subdevice #0 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC0: matt 16459 F.... pulseaudio Card0.Amixer.info: Card hw:0 'PCH'/'HDA Intel PCH at 0xa0600000 irq 48' Mixer name : 'Intel CougarPoint HDMI' Components : 'HDA:10134206,106b5b00,00100302 HDA:80862805,80860101,00100000' Controls : 30 Simple ctrls : 10 DistroRelease: Ubuntu 12.04 InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64+mac (20120425.1) MarkForUpload: True NonfreeKernelModules: wl Package: pulseaudio 1:1.1-0ubuntu15.2 PackageArchitecture: amd64 ProcEnviron: LANGUAGE=en_GB:en TERM=xterm PATH=(custom, no user) LANG=en_GB.UTF-8 SHELL=/bin/tcsh ProcVersionSignature: Ubuntu 3.2.0-38.61-generic 3.2.37 Tags: precise Uname: Linux 3.2.0-38-generic x86_64 UpgradeStatus: No upgrade log present (probably fresh install) UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo dmi.bios.date: 01/24/2012 dmi.bios.vendor: Apple Inc. dmi.bios.version: MBA41.88Z.0077.B0F.1201241549 dmi.board.asset.tag: Base Board Asset Tag# dmi.board.name: Mac-742912EFDBEE19B3 dmi.board.vendor: Apple Inc. dmi.board.version: MacBookAir4,2 dmi.chassis.type: 10 dmi.chassis.vendor: Apple Inc. dmi.chassis.version: Mac-742912EFDBEE19B3 dmi.modalias: dmi:bvnAppleInc.:bvrMBA41.88Z.0077.B0F.1201241549:bd01/24/2012:svnAppleInc.:pnMacBookAir4,2:pvr1.0:rvnAppleInc.:rnMac-742912EFDBEE19B3:rvrMacBookAir4,2:cvnAppleInc.:ct10:cvrMac-742912EFDBEE19B3: dmi.product.name: MacBookAir4,2 dmi.product.version: 1.0 dmi.sys.vendor: Apple Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/pulseaudio/+bug/1157465/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp

