aims team mailing list archive

[Launchpad Bug Tracker <1097396@xxxxxxxxxxxxxxxxxx>]

You have been subscribed to a public bug by Jan Groenewald (jan-aims):

SRU Justification:

  Impact: When using a USB audio headset with pulseaudio, if one unplugs
the headset the kernel will panic.

  Fix: This issue was because of some stable patches that were backported. The problem was shown to Takashi Iwai (upstream alsa), and he created a patch to fix this issue which was then applied to the 3.4 branch of the stable tree. This patch has then been cherry-picked to 3.2 precise. I also requested that this patch be applied to the 3.2 stable branch.
Here is the link to the commit: http://git.kernel.org/?p=linux/kernel/git/stable/linux-stable.git;a=commit;h=115b96e58609cff057d22d0e6118dae093763461

  Testcase: Plug in a USB audio headset (ensure pulseaudio is working).
Unplug it. If the kernel does not panic, then the test passes.

--

After a recent update which included a new kernel, my machine started to
panic when I removed my USB headset after our morning stand-ups.

The headset is a Cyber Acoustics USB headset.

The crash is pretty easy to reproduce.  Plugin the headset, unplug it,
panic...

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: linux-image-3.2.0-35-generic-pae 3.2.0-35.55
ProcVersionSignature: Ubuntu 3.2.0-35.55-generic-pae 3.2.34
Uname: Linux 3.2.0-35-generic-pae i686
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
ApportVersion: 2.0.1-0ubuntu15.1
Architecture: i386
ArecordDevices:
 **** List of CAPTURE Hardware Devices ****
 card 0: Intel [HDA Intel], device 0: CONEXANT Analog [CONEXANT Analog]
   Subdevices: 1/1
   Subdevice #0: subdevice #0
AudioDevicesInUse:
 USER        PID ACCESS COMMAND
 /dev/snd/controlC0:  espy       2270 F.... pulseaudio
Card0.Amixer.info:
 Card hw:0 'Intel'/'HDA Intel at 0xf2520000 irq 45'
   Mixer name	: 'Intel IbexPeak HDMI'
   Components	: 'HDA:14f15069,17aa21a4,00100302 HDA:80862804,17aa21b5,00100000'
   Controls      : 26
   Simple ctrls  : 8
Card29.Amixer.info:
 Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw 6UHT33WW-1.14'
   Mixer name	: 'ThinkPad EC 6UHT33WW-1.14'
   Components	: ''
   Controls      : 1
   Simple ctrls  : 1
Card29.Amixer.values:
 Simple mixer control 'Console',0
   Capabilities: pswitch pswitch-joined penum
   Playback channels: Mono
   Mono: Playback [on]
Date: Tue Jan  8 13:39:30 2013
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release i386 (20110427.1)
MachineType: LENOVO 2901CTO
MarkForUpload: True
ProcEnviron:
 TERM=xterm
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-35-generic-pae root=UUID=b154a7ff-6a2a-4dae-804d-0e17319a3cec ro quiet splash vt.handoff=7
RelatedPackageVersions:
 linux-restricted-modules-3.2.0-35-generic-pae N/A
 linux-backports-modules-3.2.0-35-generic-pae  N/A
 linux-firmware                                1.79.1
SourcePackage: linux
StagingDrivers: mei
UpgradeStatus: Upgraded to precise on 2012-03-03 (311 days ago)
dmi.bios.date: 04/25/2012
dmi.bios.vendor: LENOVO
dmi.bios.version: 6UET69WW (1.49 )
dmi.board.name: 2901CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr6UET69WW(1.49):bd04/25/2012:svnLENOVO:pn2901CTO:pvrThinkPadT410s:rvnLENOVO:rn2901CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 2901CTO
dmi.product.version: ThinkPad T410s
dmi.sys.vendor: LENOVO

** Affects: linux (Ubuntu)
     Importance: High
         Status: Fix Released

** Affects: linux (Ubuntu Precise)
     Importance: High
     Assignee: Chris J Arges (arges)
         Status: In Progress

** Affects: linux (Ubuntu Raring)
     Importance: High
         Status: Fix Released


** Tags: apport-bug i386 kernel-da-key precise running-unity snd-complete-urb staging
-- 
Unplugging USB Headset causes Kernel Panic
https://bugs.launchpad.net/bugs/1097396
You received this bug notification because you are a member of AIMS, which is subscribed to the bug report.