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[Fabio <fabio.pellati@xxxxxxxxx>]

I have also this issue with lenovo x1 charbon

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https://bugs.launchpad.net/bugs/1465766

Title:
  low sound volume

Status in alsa-driver package in Ubuntu:
  Expired

Bug description:
  this is a thinkpad x1 carbon 3rd gen running xubuntu 15.04

  sound volume is very low compared to windows (dual boot), even with
  alsa and pulseaudio controls set to 100% (or greater).

  this applies to all apps.

  i can get really loud sound with:
  pactl set-sink-volume 1 300000
  but then it is very distorted.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  ProcVersionSignature: Ubuntu 3.19.0-20.20-generic 3.19.8
  Uname: Linux 3.19.0-20-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  smwilson   1577 F.... pulseaudio
   /dev/snd/controlC0:  smwilson   1577 F.... pulseaudio
  CurrentDesktop: XFCE
  Date: Tue Jun 16 06:44:39 2015
  InstallationDate: Installed on 2015-06-04 (11 days ago)
  InstallationMedia: Xubuntu Core 15.04 - amd64 - 20150425
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_Card: Built-in Audio - HDA Intel PCH
  Symptom_Jack: Speaker, Internal
  Symptom_Type: Volume slider, or mixer problems
  Title: [20BSCTO1WW, Realtek ALC3232, Speaker, Internal] volume slider problem
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/01/2014
  dmi.bios.vendor: LENOVO
  dmi.bios.version: N14ET25W (1.03 )
  dmi.board.asset.tag: Not Available
  dmi.board.name: 20BSCTO1WW
  dmi.board.vendor: LENOVO
  dmi.board.version: SDK0E50510 WIN
  dmi.chassis.asset.tag: No Asset Information
  dmi.chassis.type: 10
  dmi.chassis.vendor: LENOVO
  dmi.chassis.version: None
  dmi.modalias: dmi:bvnLENOVO:bvrN14ET25W(1.03):bd12/01/2014:svnLENOVO:pn20BSCTO1WW:pvrThinkPadX1Carbon3rd:rvnLENOVO:rn20BSCTO1WW:rvrSDK0E50510WIN:cvnLENOVO:ct10:cvrNone:
  dmi.product.name: 20BSCTO1WW
  dmi.product.version: ThinkPad X1 Carbon 3rd
  dmi.sys.vendor: LENOVO

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