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[Bug 1305133] [NEW] usb headset causes "delay: estimated / actual" spam in dmesg

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Public bug reported:

I sometimes have a USB headset plugged in to my computer. When the
headset is plugged in, I get hundreds (thousands?) of messages like the
following in dmesg and syslog:

[63467.527274] delay: estimated 384, actual 240
[63490.543473] delay: estimated 0, actual 240
[63490.543490] delay: estimated 528, actual 240
[63490.543853] delay: estimated 480, actual 240
[63493.545912] delay: estimated 96, actual 240
[63493.548295] delay: estimated 384, actual 240
[63494.546711] delay: estimated 0, actual 240
[63494.546728] delay: estimated 528, actual 240
[63500.551524] delay: estimated 0, actual 240
[63500.551544] delay: estimated 528, actual 240
[63500.551560] delay: estimated 528, actual 240


To reproduce:
1) Plug in a USB headset

Expected results:
No "delay: estimated" spam in the kernel log (dmesg/syslog/kern.log)

Actual results:
Hundreds of similar messages about estimated + actual delays in the kernel log.

Unplugging the USB headset makes the problem stop.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-image-3.13.0-23-generic 3.13.0-23.45
ProcVersionSignature: Ubuntu 3.13.0-23.45-generic 3.13.8
Uname: Linux 3.13.0-23-generic x86_64
ApportVersion: 2.14.1-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC2:  steve      2277 F.... pulseaudio
 /dev/snd/controlC1:  steve      2277 F.... pulseaudio
 /dev/snd/controlC0:  steve      2277 F.... pulseaudio
CurrentDesktop: Unity
Date: Wed Apr  9 11:11:23 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 (127 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-3.13.0-23-generic root=UUID=0b9db31c-747b-40ad-bbbd-13a9a29caece ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.13.0-23-generic N/A
 linux-backports-modules-3.13.0-23-generic  N/A
 linux-firmware                             1.127
SourcePackage: linux
UpgradeStatus: Upgraded to trusty on 2014-02-12 (55 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.

** Affects: linux (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug trusty

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https://bugs.launchpad.net/bugs/1305133

Title:
  usb headset causes "delay: estimated / actual" spam in dmesg

Status in “linux” package in Ubuntu:
  New

Bug description:
  I sometimes have a USB headset plugged in to my computer. When the
  headset is plugged in, I get hundreds (thousands?) of messages like
  the following in dmesg and syslog:

  [63467.527274] delay: estimated 384, actual 240
  [63490.543473] delay: estimated 0, actual 240
  [63490.543490] delay: estimated 528, actual 240
  [63490.543853] delay: estimated 480, actual 240
  [63493.545912] delay: estimated 96, actual 240
  [63493.548295] delay: estimated 384, actual 240
  [63494.546711] delay: estimated 0, actual 240
  [63494.546728] delay: estimated 528, actual 240
  [63500.551524] delay: estimated 0, actual 240
  [63500.551544] delay: estimated 528, actual 240
  [63500.551560] delay: estimated 528, actual 240

  
  To reproduce:
  1) Plug in a USB headset

  Expected results:
  No "delay: estimated" spam in the kernel log (dmesg/syslog/kern.log)

  Actual results:
  Hundreds of similar messages about estimated + actual delays in the kernel log.

  Unplugging the USB headset makes the problem stop.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-23-generic 3.13.0-23.45
  ProcVersionSignature: Ubuntu 3.13.0-23.45-generic 3.13.8
  Uname: Linux 3.13.0-23-generic x86_64
  ApportVersion: 2.14.1-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC2:  steve      2277 F.... pulseaudio
   /dev/snd/controlC1:  steve      2277 F.... pulseaudio
   /dev/snd/controlC0:  steve      2277 F.... pulseaudio
  CurrentDesktop: Unity
  Date: Wed Apr  9 11:11:23 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 (127 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-3.13.0-23-generic root=UUID=0b9db31c-747b-40ad-bbbd-13a9a29caece ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-23-generic N/A
   linux-backports-modules-3.13.0-23-generic  N/A
   linux-firmware                             1.127
  SourcePackage: linux
  UpgradeStatus: Upgraded to trusty on 2014-02-12 (55 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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