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[Cocodude <marc@xxxxxxxxxxxxxxxxxxxx>]

This affects me too.

This is on a modern PowerEdge T20 server but it uses the same RealTek
audio chip.

A workaround is to use one of the two methods:

1) Using pavucontrol, switch the output from "Speakers" to "Headphones (unplugged)".
2) Using alsamixer, increase the "Headphone" volume and disable "Speaker".

This bug looks like the same one that's also expired at
https://bugzilla.redhat.com/show_bug.cgi?id=1133321 but it does appear
to be genuine.

** Bug watch added: Red Hat Bugzilla #1133321
   https://bugzilla.redhat.com/show_bug.cgi?id=1133321

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You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to alsa-driver in Ubuntu.
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:
  Confirmed

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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