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[Bug 917690] Re: Disconnecting USB sound card causes kernel panic


ff1111, this bug was reported a while ago and there hasn't been any
activity in it recently. We were wondering if this is still an issue? If
so, could you please test for this with the latest development release
of Ubuntu? ISO images are available from http://cdimage.ubuntu.com
/daily-live/current/ .

If it remains an issue, could you please run the following command in
the development release from a Terminal
(Applications->Accessories->Terminal), as it will automatically gather
and attach updated debug information to this report:

apport-collect -p linux <replace-with-bug-number>

Also, could you please test the latest upstream kernel available (not the daily folder) following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine the issue. Once you've tested the upstream kernel, please comment on which kernel version specifically you tested. If this bug is fixed in the mainline kernel, please add the following tags:

where VERSION-NUMBER is the version number of the kernel you tested. For example:

This can be done by clicking on the yellow circle with a black pencil icon next to the word Tags located at the bottom of the bug description. As well, please remove the tag:

If the mainline kernel does not fix this bug, please add the following tags:

As well, please remove the tag:

Once testing of the upstream kernel is complete, please mark this bug's
Status as Confirmed. Please let us know your results. Thank you for your

** Changed in: linux (Ubuntu)
       Status: Triaged => Incomplete

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  Disconnecting USB sound card causes kernel panic

Status in “linux” package in Ubuntu:

Bug description:
  Since upgrading from Natty to Oneiric, disconnecting my USB sound card
  (C-Media USB Audio Device) while it is the primary sound card results
  in kernel panic.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: linux-image-3.0.0-14-generic 3.0.0-14.23
  ProcVersionSignature: Ubuntu 3.0.0-14.23-generic 3.0.9
  Uname: Linux 3.0.0-14-generic x86_64
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 1.23-0ubuntu4
  Architecture: amd64
   /dev/snd/controlC1:  fraidy     2124 F.... pulseaudio
   /dev/snd/controlC0:  fraidy     2124 F.... pulseaudio
   Card hw:0 'Intel'/'HDA Intel at 0xf0500000 irq 48'
     Mixer name	: 'Conexant CX20561 (Hermosa)'
     Components	: 'HDA:14f15051,1179ff51,00100000'
     Controls      : 14
     Simple ctrls  : 7
   Card hw:1 'Device'/'C-Media USB Audio Device at usb-0000:00:1d.0-1, full speed'
     Mixer name	: 'USB Mixer'
     Components	: 'USB0d8c:0008'
     Controls      : 7
     Simple ctrls  : 3
  Date: Tue Jan 17 10:16:42 2012
  InstallationMedia: Ubuntu 10.04 "Lucid Lynx" - Alpha amd64 (20091209)
  MachineType: TOSHIBA Satellite U400
   PATH=(custom, no user)
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-14-generic root=UUID=f37ac046-01cd-495d-a09a-2762a1c1a3f5 ro quiet splash vt.handoff=7
   linux-restricted-modules-3.0.0-14-generic N/A
   linux-backports-modules-3.0.0-14-generic  N/A
   linux-firmware                            1.60
   0: phy0: Wireless LAN
   	Soft blocked: yes
   	Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: Upgraded to oneiric on 2011-12-22 (26 days ago)
   # ALSA library configuration file
   # Include settings that are under the control of asoundconf(1).
   # (To disable these settings, comment out this line.)
  dmi.bios.date: 08/25/2008
  dmi.bios.vendor: TOSHIBA
  dmi.bios.version: V3.20
  dmi.board.name: Satellite U400
  dmi.board.vendor: TOSHIBA
  dmi.board.version: Not Applicable
  dmi.chassis.asset.tag: No Asset Tag
  dmi.chassis.type: 10
  dmi.chassis.vendor: TOSHIBA
  dmi.chassis.version: N/A
  dmi.modalias: dmi:bvnTOSHIBA:bvrV3.20:bd08/25/2008:svnTOSHIBA:pnSatelliteU400:pvrPSU40U-0HQ01G:rvnTOSHIBA:rnSatelliteU400:rvrNotApplicable:cvnTOSHIBA:ct10:cvrN/A:
  dmi.product.name: Satellite U400
  dmi.product.version: PSU40U-0HQ01G
  dmi.sys.vendor: TOSHIBA

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