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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:

apport-collect 1380046

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

** Changed in: linux (Ubuntu)
       Status: New => Incomplete

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https://bugs.launchpad.net/bugs/1380046

Title:
  [AV200 - Xonar STX, playback] Loud pop when switching to headphones

Status in “alsa-driver” package in Ubuntu:
  New
Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  When switching the port to either headphone ports from the speaker
  port there is a loud pop in the headphones. When I am playing music
  through the speakers at 100% volume and then switch, I can hear the
  music at a very loud volume through the headphones for a fraction of a
  second before dropping to the proper headphones volume which is much
  lower. Even if I mute the output before switching ports there is still
  a pop although not nearly as loud.

  I believe this is a driver issue (oxygen/virtuoso). The Essense STX
  uses a relay to switch between the speaker and headphones ports. I am
  guessing the the power for the speaker (line out) port is much higher
  than that used for the headphones port and the drivers need to mute
  the sound at a hardware level before switching to elmininate the pop.
  On Windows when switching to and from speaker and headphones port the
  output would be muted for almost a second as the port was switched so
  there was no pop. On Ubuntu there is no delay when switching ports. I
  have looked at the driver source code and there is an anti_pop_delay
  of 800 milliseconds used on the Xonar init method. I think this same
  delay should probably be added when switching to the headphone ports.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  ProcVersionSignature: Ubuntu 3.13.0-37.64-generic 3.13.11.7
  Uname: Linux 3.13.0-37-generic x86_64
  NonfreeKernelModules: fglrx
  ApportVersion: 2.14.1-0ubuntu3.5
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC2:  michael   20842 F.... pulseaudio
   /dev/snd/controlC0:  michael   20842 F.... pulseaudio
   /dev/snd/pcmC0D0p:   michael   20842 F...m pulseaudio
   /dev/snd/controlC1:  michael   20842 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Sat Oct 11 22:50:15 2014
  InstallationDate: Installed on 2014-10-07 (3 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:STX successful
  Symptom_Card: HD Webcam C910 - USB Device 0x46d:0x821
  Symptom_PulsePlaybackTest: PulseAudio playback test successful
  Symptom_Type: None of the above
  Title: [AV200 - Xonar STX, playback] Playback problem
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 08/20/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 1401
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: P8H77-M PRO
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: Rev X.0x
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1401:bd08/20/2013:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnP8H77-MPRO:rvrRevX.0x:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: System Product Name
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer

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