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[Alex <axfelix@xxxxxxxxx>]

I'm also having trouble with a Logitech C310 -- no audio since going to
a 3.19 kernel (I'm on 14.04.3).

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https://bugs.launchpad.net/bugs/1457508

Title:
  [USB-Audio - Logitech USB Headset, recording] No sound at all

Status in alsa-driver package in Ubuntu:
  Expired

Bug description:
  Since upgrade to Vivid, my Logitech Clearchat Pro USB Headset mic is
  not working any more.

  No recording activity in pavucontrol from ClearChat Pro USB, although
  i can see recording activity from my Logitech C270 USB Webcam.

  By the past i noticed similar issues, always corrected by kernel
  upgrades.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: alsa-base 1.0.25+dfsg-0ubuntu4
  ProcVersionSignature: Ubuntu 3.19.0-16.16-generic 3.19.3
  Uname: Linux 3.19.0-16-generic x86_64
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC2:  manu      31450 F.... pulseaudio
   /dev/snd/controlC1:  manu      31450 F.... pulseaudio
   /dev/snd/controlC0:  manu      31450 F.... pulseaudio
  CurrentDesktop: GNOME
  Date: Thu May 21 16:11:55 2015
  InstallationDate: Installed on 2014-03-27 (419 days ago)
  InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1)
  PackageArchitecture: all
  SourcePackage: alsa-driver
  Symptom: audio
  Symptom_AlsaRecordingPlaybackStderr: o p e n ( ) :   N o   s u c h   f i l e   o r   d i r e c t o r y
  Symptom_AlsaRecordingTest: ALSA recording test through plughw:Headset failed
  Symptom_AlsaRecordingTestStderr: a r e c o r d :   p c m _ r e a d : 2 0 3 1 :   r e a d   e r r o r :   N o   s u c h   d e v i c e
  Symptom_Card: Webcam C270 - USB Device 0x46d:0x825
  Symptom_DevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC2:  manu      31450 F.... pulseaudio
   /dev/snd/controlC1:  manu      31450 F.... pulseaudio
   /dev/snd/controlC0:  manu      31450 F.... pulseaudio
  Symptom_Type: No sound at all
  Title: [USB-Audio - Logitech USB Headset, recording] No sound at all
  UpgradeStatus: Upgraded to vivid on 2015-04-28 (23 days ago)
  dmi.bios.date: 09/17/2013
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A03
  dmi.board.name: 0XCR8D
  dmi.board.vendor: Dell Inc.
  dmi.board.version: A01
  dmi.chassis.type: 15
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA03:bd09/17/2013:svnDellInc.:pnOptiPlex9020:pvr01:rvnDellInc.:rn0XCR8D:rvrA01:cvnDellInc.:ct15:cvr:
  dmi.product.name: OptiPlex 9020
  dmi.product.version: 01
  dmi.sys.vendor: Dell Inc.

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