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[Tim Passingham <tim@xxxxxxxxxxxxxxxxxxxx>]

I get the same problem with a Meridian explorer USB DAC on an Xubuntu
14.04 system.

I know little about the bug fixing process but I really hope this fix
gets into the trusty stable kernel soon.   I was hoping it might be in
"3.13.0-29-generic #53-Ubuntu SMP Wed Jun 4 21:00:20 UTC 2014 x86_64
x86_64 x86_64 GNU/Linux" installed today, but no such luck.

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https://bugs.launchpad.net/bugs/1319457

Title:
  usb headset causes "retire_playback_urb ... callbacks suppressed" spam
  in dmesg

Status in “linux” package in Ubuntu:
  Triaged

Bug description:
  With my USB headset plugged in to my computer. When the headset is plugged in, I get tens of messages like the following in dmesg and syslog:
  May 14 11:25:24 aether kernel: [  315.447988] retire_playback_urb: 829 callbacks suppressed
  May 14 11:25:29 aether kernel: [  320.458042] retire_playback_urb: 831 callbacks suppressed

  The following patch was written to supress these rate-limited messages
  in syslog https://lkml.org/lkml/2014/5/2/156 .

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-26-generic 3.13.0-26.48
  ProcVersionSignature: Ubuntu 3.13.0-26.48-generic 3.13.11
  Uname: Linux 3.13.0-26-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC2:  steve      2643 F.... pulseaudio
   /dev/snd/controlC1:  steve      2643 F.... pulseaudio
   /dev/snd/controlC0:  steve      2643 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Wed May 14 11:29:19 2014
  DistributionChannelDescriptor:
   # This is a distribution channel descriptor
   # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
   canonical-oem-somerville-precise-amd64-20130203-1
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=79084358-087f-4cee-a0be-e2f78361873f
  InstallationDate: Installed on 2013-12-02 (162 days ago)
  InstallationMedia: Ubuntu 12.04 "Precise" - Build amd64 LIVE Binary 20130203-13:50
  MachineType: Dell Inc. XPS13 9333
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-26-generic root=UUID=0b9db31c-747b-40ad-bbbd-13a9a29caece ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-26-generic N/A
   linux-backports-modules-3.13.0-26-generic  N/A
   linux-firmware                             1.127.2
  SourcePackage: linux
  UpgradeStatus: Upgraded to trusty on 2014-02-12 (90 days ago)
  dmi.bios.date: 11/11/2013
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A01
  dmi.board.name: 0GFTRT
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A00
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.chassis.version: 0.1
  dmi.modalias: dmi:bvnDellInc.:bvrA01:bd11/11/2013:svnDellInc.:pnXPS139333:pvr:rvnDellInc.:rn0GFTRT:rvrA00:cvnDellInc.:ct8:cvr0.1:
  dmi.product.name: XPS13 9333
  dmi.sys.vendor: Dell Inc.

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