To perform a bisect and identify the commit that introduced this, we need to find the last good kernel and first bad kernel. We now know 3.2 final has the bug. Can you also test the 3.1 final kernel to see if it has the bug:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.1-oneiric/ If it does, please test the 3.0 final kernel: http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.0-oneiric/ -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1223055 Title: System Hangs With Kernel Migration Processes Consuming 100% CPU Status in “linux” package in Ubuntu: Incomplete Bug description: Once or twice a week, the system becomes non-responsive, with the mouse cursor tracking mouse movement but no keyboard response. Until today I would resort to using the kernel magic keys to reboot the system (R-E-I-S-U-B). Today I remotely logged in from another machine on the LAN and discovered that not only was the kernel alive and all processes running, but that the "migration/0" and "migration/1" processes were consuming 50% of the CPU each, as reported by top(1). I suspect this is why the system becomes non-responsive. ProblemType: Bug DistroRelease: Ubuntu 12.04 Package: linux-generic 3.2.0.53.63 ProcVersionSignature: Ubuntu 3.2.0-53.81-generic 3.2.50 Uname: Linux 3.2.0-53-generic i686 AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24. ApportVersion: 2.0.1-0ubuntu17.4 Architecture: i386 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: andy 2195 F.... pulseaudio /dev/snd/controlC0: andy 2195 F.... pulseaudio Card0.Amixer.info: Card hw:0 'Intel'/'HDA Intel at 0xee400000 irq 47' Mixer name : 'Analog Devices AD1981' Components : 'HDA:11d41981,17aa2025,00100200' Controls : 21 Simple ctrls : 12 Card1.Amixer.info: Card hw:1 'U0x46d0x804'/'USB Device 0x46d:0x804 at usb-0000:00:1d.7-6.2.2, high speed' Mixer name : 'USB Mixer' Components : 'USB046d:0804' Controls : 2 Simple ctrls : 1 Card1.Amixer.values: Simple mixer control 'Mic',0 Capabilities: cvolume cvolume-joined cswitch cswitch-joined penum Capture channels: Mono Limits: Capture 0 - 6144 Mono: Capture 4608 [75%] [24.00dB] [on] Card29.Amixer.info: Card hw:29 'ThinkPadEC'/'ThinkPad Console Audio Control at EC reg 0x30, fw 79HT50WW-1.07' Mixer name : 'ThinkPad EC 79HT50WW-1.07' Components : '' Controls : 2 Simple ctrls : 1 Card29.Amixer.values: Simple mixer control 'Console',0 Capabilities: pvolume pvolume-joined pswitch pswitch-joined penum Playback channels: Mono Limits: Playback 0 - 14 Mono: Playback 7 [50%] [on] Date: Mon Sep 9 16:56:22 2013 HibernationDevice: RESUME=UUID=5301c707-e227-46f3-8b49-a319582091a4 InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007) MachineType: LENOVO 8743CTO MarkForUpload: True PccardctlIdent: Socket 0: no product info available PccardctlStatus: Socket 0: no card ProcFB: 0 VESA VGA ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-53-generic root=UUID=a9ba509e-76a3-4c03-b898-0409f24233eb ro quiet splash nomodeset vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.2.0-53-generic N/A linux-backports-modules-3.2.0-53-generic N/A linux-firmware 1.79.6 SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 02/05/2008 dmi.bios.vendor: LENOVO dmi.bios.version: 7IET32WW (1.13 ) dmi.board.name: 8743CTO 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:bvr7IET32WW(1.13):bd02/05/2008:svnLENOVO:pn8743CTO:pvrThinkPadT60:rvnLENOVO:rn8743CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable: dmi.product.name: 8743CTO dmi.product.version: ThinkPad T60 dmi.sys.vendor: LENOVO To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1223055/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp