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[Raymond <1425088@xxxxxxxxxxxxxxxxxx>]

pulseaudion don't support multi channel volume control

https://bugs.freedesktop.org/show_bug.cgi?id=84983

Simple mixer control 'Speaker',0
  Capabilities: pvolume pswitch pswitch-joined
  Playback channels: Front Left - Front Right - Rear Left - Rear Right - Front Center - Woofer - Side Left - Side Right
  Limits: Playback 0 - 197
  Mono:
  Front Left: Playback 90 [46%] [-20.06dB] [on]
  Front Right: Playback 90 [46%] [-20.06dB] [on]
  Rear Left: Playback 90 [46%] [-20.06dB] [on]
  Rear Right: Playback 90 [46%] [-20.06dB] [on]
  Front Center: Playback 90 [46%] [-20.06dB] [on]
  Woofer: Playback 90 [46%] [-20.06dB] [on]
  Side Left: Playback 90 [46%] [-20.06dB] [on]
  Side Right: Playback 90 [46%] [-20.06dB] [on]


** Bug watch added: freedesktop.org Bugzilla #84983
   https://bugs.freedesktop.org/show_bug.cgi?id=84983

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https://bugs.launchpad.net/bugs/1425088

Title:
  [USB-Audio - PnP Audio Device, playback] Sound is distorted

Status in alsa-driver package in Ubuntu:
  New

Bug description:
  It works properly for some time.
  Then, in a sudden, sound output is multiplied and distorted.
  Then, there is no way how to configure it to make it work properly. I need to reinstall drivers and reset computer.

  I did:
  sudo m-a update
  sudo m-a prepare

  rm -r ~/.pulse ~/.asound*
  sudo rm /etc/asound.conf

  and later reset and everything works for another while.

  But problem comes again and again.

  My system runs Ubuntu 14.10, 64 bits

  ProblemType: Bug
  DistroRelease: Ubuntu 14.10
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  ProcVersionSignature: Ubuntu 3.16.0-30.40-generic 3.16.7-ckt3
  Uname: Linux 3.16.0-30-generic x86_64
  ApportVersion: 2.14.7-0ubuntu8.2
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  soldeplata   2494 F.... pulseaudio
  CurrentDesktop: GNOME
  Date: Tue Feb 24 14:59:03 2015
  InstallationDate: Installed on 2015-02-10 (14 days ago)
  InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
  PackageArchitecture: all
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=es_ES.UTF-8
   SHELL=/bin/bash
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_AlsaPlaybackTest: ALSA playback test through plughw:Device failed
  Symptom_Card: CM6501 - PnP Audio Device
  Symptom_Type: Digital clip or distortion, or "overdriven" sound
  Title: [USB-Audio - PnP Audio Device, playback] Sound is distorted
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/05/2006
  dmi.bios.vendor: Phoenix Technologies, LTD
  dmi.bios.version: ASUS M2N-E SLI ACPI BIOS Revision 0506
  dmi.board.name: M2N-E SLI
  dmi.board.vendor: ASUSTeK Computer INC.
  dmi.board.version: 1.XX
  dmi.chassis.asset.tag: 123456789000
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnPhoenixTechnologies,LTD:bvrASUSM2N-ESLIACPIBIOSRevision0506:bd12/05/2006:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnM2N-ESLI:rvr1.XX:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: System Product Name
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer

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