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[Byte <1404731@xxxxxxxxxxxxxxxxxx>]

Raymond,

I really don't know if I have this patch, but I've tried to use alsa
daily builds here (https://code.launchpad.net/~ubuntu-audio-
dev/+archive/ubuntu/alsa-daily/+packages) and have installed "oem-audio-
hda-daily-dkms - 0.201412220201~ubuntu14.04.1", but it didn't help :(

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https://bugs.launchpad.net/bugs/1404731

Title:
  [ Dell OptiPlex 7020, Realtek ALC3220, Green Line Out, Rear]
  Background noise

Status in alsa-driver package in Ubuntu:
  New

Bug description:
  Any time I start Ubuntu, just a  sec before it starts I begin to hear background noise from speakers. And the noise isn't gone until I 
  shutdown the system.

  By the way, when I start listening to any music, I can't get any bass
  (although, I have a speaker system with sub woofer, and it worked fine
  for me on the previous computer).

  A lot of workaround didn't help.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  ProcVersionSignature: Ubuntu 3.13.0-43.72-generic 3.13.11.11
  Uname: Linux 3.13.0-43-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.6
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  byte       1547 F.... pulseaudio
   /dev/snd/controlC0:  byte       1547 F.... pulseaudio
  CurrentDesktop: Unity
  CurrentDmesg:
   [   18.943961] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
   [   19.717121] init: plymouth-upstart-bridge main process ended, respawning
   [   19.722598] init: plymouth-upstart-bridge main process ended, respawning
  Date: Mon Dec 22 00:11:51 2014
  InstallationDate: Installed on 2014-12-21 (0 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 7020, Realtek ALC3220, Green Line Out, Rear] Background noise or low volume
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 04/25/2014
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A00
  dmi.board.name: 08WKV3
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 6
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA00:bd04/25/2014:svnDellInc.:pnOptiPlex7020:pvr01:rvnDellInc.:rn08WKV3:rvrA00:cvnDellInc.:ct6:cvr:
  dmi.product.name: OptiPlex 7020
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.

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