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[Bug 1425221] Re: [OptiPlex 9020, Realtek ALC280, Green Line Out, Rear] tinny sound

 

1.611977] autoconfig: line_outs=1 (0x1b/0x0/0x0/0x0/0x0) type:line
[    1.611979]    speaker_outs=1 (0x14/0x0/0x0/0x0/0x0)
[    1.611980]    hp_outs=1 (0x15/0x0/0x0/0x0/0x0)
[    1.611980]    mono: mono_out=0x0
[    1.611981]    inputs:
[    1.611982]      Front Mic=0x1a
[    1.611982]      Rear Mic=0x18


https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/pci/hda?id=03ad6a8c93b6df2d65c305b5b5f9474068b45bfb


you need this parch to change pcm playback volume to speaker+lo playback volume if speaker and line out share the volume control

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https://bugs.launchpad.net/bugs/1425221

Title:
  [OptiPlex 9020, Realtek ALC280, Green Line Out, Rear] tinny sound

Status in alsa-driver package in Ubuntu:
  Confirmed

Bug description:
  Sound equalization is normal when using jack in front of computer, but
  is "tinny" (i.e., low/nonexistent bass and midtones) when using rear
  output jack  with simple two channel headphones.

  Jack sense is working correctly because the internal speaker cuts out
  when a cable is plugged into the rear jack (or front jack, for that
  matter).

  Note Dell's website says this computer has a Realtek ALC3220, as
  opposed to the ALC280 which is detected by linux.  This is a clean
  install of 14.04, so I unfortunately I can't boot into Windows to
  observe its behavior.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  ProcVersionSignature: Ubuntu 3.13.0-45.74-generic 3.13.11-ckt13
  Uname: Linux 3.13.0-45-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.7
  Architecture: amd64
  CurrentDesktop: Unity
  Date: Tue Feb 24 12:31:49 2015
  InstallationDate: Installed on 2015-01-30 (25 days ago)
  InstallationMedia: Ubuntu 14.04.1 LTS "Trusty Tahr" - Release amd64 (20140722.2)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_AlsaPlaybackTest: ALSA playback test through plughw:PCH successful
  Symptom_Card: Built-in Audio - HDA Intel PCH
  Symptom_Jack: Green Line Out, Rear
  Symptom_PulsePlaybackTest: PulseAudio playback test successful
  Symptom_Type: High background noise, or volume is too low
  Title: [OptiPlex 9020, Realtek ALC280, Green Line Out, Rear] Background noise or low volume
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 11/20/2014
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A09
  dmi.board.name: 06X1TJ
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 6
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA09:bd11/20/2014:svnDellInc.:pnOptiPlex9020:pvr01:rvnDellInc.:rn06X1TJ:rvrA00:cvnDellInc.:ct6:cvr:
  dmi.product.name: OptiPlex 9020
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.

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References