** Description changed: + 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 + **** 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 + 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 + 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 + 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] + 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 + 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 + 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
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1097396 Title: Unplugging USB Headset causes Kernel Panic To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1097396/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
