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[Harry Coin <hcoin@xxxxxxxxxxxxxxxxx>]

Confirming the problem is not fixed in 
3.13.0-46-generic #79-Ubuntu SMP Tue Mar 10 20:06:50 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

After this in the syslog
Mar 15 15:31:40 ceo1home kernel: [62288.808120] retire_capture_urb: 542 callbacks suppressed
Mar 15 15:31:45 ceo1home kernel: [62293.841065] retire_capture_urb: 527 callbacks suppressed
Mar 15 15:31:50 ceo1home kernel: [62298.868015] retire_capture_urb: 555 callbacks suppressed
Mar 15 15:31:55 ceo1home kernel: [62303.881960] retire_capture_urb: 552 callbacks suppressed
Mar 15 15:32:00 ceo1home kernel: [62308.896913] retire_capture_urb: 572 callbacks suppressed
Mar 15 15:32:05 ceo1home kernel: [62313.914858] retire_capture_urb: 563 callbacks suppressed
Mar 15 15:32:10 ceo1home kernel: [62318.919806] retire_capture_urb: 558 callbacks suppressed
Mar 15 15:32:15 ceo1home kernel: [62323.940758] retire_capture_urb: 548 callbacks suppressed
Mar 15 15:32:20 ceo1home kernel: [62328.974706] retire_capture_urb: 522 callbacks suppressed
Mar 15 15:32:25 ceo1home kernel: [62333.987654] retire_capture_urb: 576 callbacks suppressed

I unplugged the headset, then replugged it to get:

Mar 15 15:45:55 ceo1home kernel: [63144.734024] usb 2-5.2: New USB device found, idVendor=046d, idProduct=0a02
Mar 15 15:45:55 ceo1home kernel: [63144.734030] usb 2-5.2: New USB device strings: Mfr=1, Product=2, SerialNumber=0
Mar 15 15:45:55 ceo1home kernel: [63144.734034] usb 2-5.2: Product: Logitech USB Headset
Mar 15 15:45:55 ceo1home kernel: [63144.734037] usb 2-5.2: Manufacturer: Logitech
Mar 15 15:45:55 ceo1home kernel: [63144.746773] usb_audio: Warning! Unlikely big volume range (=464), cval->res is probably wrong.
Mar 15 15:45:55 ceo1home kernel: [63144.746778] usb_audio: [6] FU [Mic Playback Volume] ch = 1, val = -10496/-3072/16<6>[63144.763095] input: Logitech Logitech USB Headset as /devices/pci0000:00/0000:00:1d.7/usb2/2-5/2-5.2/2-5.2:1.3/input/input25
Mar 15 15:45:55 ceo1home kernel: [63144.763307] hid-generic 0003:046D:0A02.0006: input,hidraw0: USB HID v1.00 Device [Logitech Logitech USB Headset] on usb-0000:00:1d.7-5.2/input3
Mar 15 15:45:55 ceo1home mtp-probe: checking bus 2, device 9: "/sys/devices/pci0000:00/0000:00:1d.7/usb2/2-5/2-5.2"
Mar 15 15:45:55 ceo1home mtp-probe: bus: 2, device: 9 was not an MTP device
Mar 15 15:45:56 ceo1home rtkit-daemon[3225]: Successfully made thread 13980 of process 28715 (n/a) owned by '1000' RT at priority 5.
Mar 15 15:45:56 ceo1home rtkit-daemon[3225]: Supervising 3 threads of 1 processes of 1 users.
Mar 15 15:45:56 ceo1home rtkit-daemon[3225]: Successfully made thread 13981 of process 28715 (n/a) owned by '1000' RT at priority 5.
Mar 15 15:45:56 ceo1home rtkit-daemon[3225]: Supervising 4 threads of 1 processes of 1 users.
Mar 15 15:45:58 ceo1home kernel: [63147.787367] retire_capture_urb: 528 callbacks suppressed

...
Problem recurs.  

Not fixed as yet....

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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:
  Fix Released
Status in linux source package in Trusty:
  Fix Released

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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