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[Bug 980153] Re: Hotplug of iMic USB soundcard does not always produce a viable audio output --Precise upgrade


A few months short of THREE years later, this issue is still there in
Ubuntu 14.04 .

I see the iMic when I hotplug it, but only as a device. Pulseaudio does
not assign it to either sink or source (while the device provides both).
Using pavucontrol I do see 3 possible configurations in the
configuration tab: stereo, mono and off. But those don't serve a

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  Hotplug of iMic USB soundcard does not always produce a viable audio
  output --Precise upgrade

Status in pulseaudio package in Ubuntu:

Bug description:
  Hotplug of iMic USB soundcard does not always produce a viable audio output on Precise upgrade

  Steps to reproduce
  -boot up with iMic plugged in
  -unplug iMic
  -wait a minute
  -plug the iMic back in
  -select the iMic as output in the system sound preference pane

  -no audio via iMic
  -audio continues via build in speakers

  Expected results
  -audio  via iMic
  -audio via build in speakers should cut off

  Work around:
  Runs fine if the computer has booted with the iMic plugged in.
  reboot with iMic plugged in

  iMic hardware details:
  Griffin Technology, Inc iMic USB audio system, the earlier model if I recall.  The following terminal command apparently reveal only the internal sound card.

  dmesg | grep sound

  Both lsusb | grep audio and lsusb | grep sound don't retrieve any
  info, which is odd because the system sound preference pane lists the
  iMic device as an output.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: pulseaudio 1:1.1-0ubuntu15
  ProcVersionSignature: Ubuntu 3.2.0-23.36-generic 3.2.14
  Uname: Linux 3.2.0-23-generic i686
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 2.0.1-0ubuntu2
  Architecture: i386
   /dev/snd/controlC0:  mo        25705 F.... pulseaudio
   /dev/snd/pcmC0D0c:   mo        25705 F...m pulseaudio
   Card hw:0 'Intel'/'HDA Intel at 0x98400000 irq 46'
     Mixer name	: 'SigmaTel STAC9221 A1'
     Components	: 'HDA:83847680,106b0200,00103401'
     Controls      : 23
     Simple ctrls  : 12
   Card hw:1 'system'/'Griffin Technology, Inc iMic USB audio system at usb-0000:00:1d.0-1, full speed'
     Mixer name	: 'USB Mixer'
     Components	: 'USB077d:07af'
     Controls      : 8
     Simple ctrls  : 6
  Date: Thu Apr 12 13:46:21 2012
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
  SourcePackage: pulseaudio
  UpgradeStatus: Upgraded to precise on 2012-03-23 (19 days ago)
  dmi.bios.date: 10/12/06
  dmi.bios.vendor: Apple Computer, Inc.
  dmi.bios.version: MBP11.88Z.0055.B08.0610121325
  dmi.board.asset.tag: Base Board Asset Tag
  dmi.board.name: Mac-F425BEC8
  dmi.board.vendor: Apple Computer, Inc.
  dmi.board.version: PVT
  dmi.chassis.asset.tag: Asset Tag
  dmi.chassis.type: 8
  dmi.chassis.vendor: Apple Computer, Inc.
  dmi.chassis.version: Mac-F425BEC8
  dmi.modalias: dmi:bvnAppleComputer,Inc.:bvrMBP11.88Z.0055.B08.0610121325:bd10/12/06:svnAppleComputer,Inc.:pnMacBookPro1,1:pvr1.0:rvnAppleComputer,Inc.:rnMac-F425BEC8:rvrPVT:cvnAppleComputer,Inc.:ct8:cvrMac-F425BEC8:
  dmi.product.name: MacBookPro1,1
  dmi.product.version: 1.0
  dmi.sys.vendor: Apple Computer, Inc.

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