This still needs further investigation. This issue appears to be an upstream bug, since you tested the latest upstream kernel. Would it be possible for you to open an upstream bug report[0]? That will allow the upstream Developers to examine the issue, and may provide a quicker resolution to the bug.
Please follow the instructions on the wiki page[0]. The first step is to email the appropriate mailing list. If no response is received, then a bug may be opened on bugzilla.kernel.org. Once this bug is reported upstream, please add the tag: 'kernel-bug- reported-upstream'. [0] https://wiki.ubuntu.com/Bugs/Upstream/kernel -- 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/1356558 Title: BUG: soft lockup - CPU stuck for 22s! [md3_raid1] Status in linux package in Ubuntu: Confirmed Bug description: Hi, this bug appeared in Ubuntu 14.04, Ubuntu 12.04 didn't show this behavior. I've found a possible predecessor in bug #212684. Switching to a recent mainline kernel didn't fix this issue. Starting $ /usr/share/mdadm/checkarray /dev/md3 will repeat this behavior. /dev/md3 is a LVM PV: --- Physical volume --- PV Name /dev/md3 VG Name local_vg1 PV Size 1.36 TiB / not usable 2.25 MiB Allocatable yes PE Size 4.00 MiB Total PE 355619 Free PE 31011 Allocated PE 324608 ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: linux-image-3.13.0-33-generic 3.13.0-33.58 ProcVersionSignature: Ubuntu 3.13.0-33.58-generic 3.13.11.4 Uname: Linux 3.13.0-33-generic i686 AlsaVersion: Advanced Linux Sound Architecture Driver Version k3.13.0-33-generic. AplayDevices: Error: [Errno 2] No such file or directory: 'aplay' ApportVersion: 2.14.1-0ubuntu3.3 Architecture: i386 ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord' AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/controlC0', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/pcmC0D1p', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1: CRDA: Error: [Errno 2] No such file or directory: 'iw' Card0.Amixer.info: Error: [Errno 2] No such file or directory: 'amixer' Card0.Amixer.values: Error: [Errno 2] No such file or directory: 'amixer' Date: Wed Aug 13 21:42:12 2014 HibernationDevice: RESUME=UUID=c4a03c5e-f650-4ca8-9dab-f0c4ad12c901 InstallationDate: Installed on 2014-07-06 (37 days ago) InstallationMedia: Ubuntu-Server 14.04 LTS "Trusty Tahr" - Release i386 (20140416.2) IwConfig: lo no wireless extensions. em1 no wireless extensions. ProcEnviron: LANGUAGE=en_GB:en TERM=xterm-256color PATH=(custom, no user) LANG=en_GB.UTF-8 SHELL=/bin/bash ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-33-generic root=UUID=9c2715cb-dd8a-4687-9537-009e1e4e83d8 ro nomdmonddf nomdmonisw RelatedPackageVersions: linux-restricted-modules-3.13.0-33-generic N/A linux-backports-modules-3.13.0-33-generic N/A linux-firmware 1.127.5 RfKill: Error: [Errno 2] No such file or directory: 'rfkill' SourcePackage: linux UpgradeStatus: No upgrade log present (probably fresh install) dmi.bios.date: 05/19/2010 dmi.bios.vendor: Intel Corp. dmi.bios.version: JT94510H.86A.0045.2010.0519.1750 dmi.board.name: D945GSEJT dmi.board.vendor: Intel Corporation dmi.board.version: AAE57850-300 dmi.chassis.type: 3 dmi.modalias: dmi:bvnIntelCorp.:bvrJT94510H.86A.0045.2010.0519.1750:bd05/19/2010:svn:pn:pvr:rvnIntelCorporation:rnD945GSEJT:rvrAAE57850-300:cvn:ct3:cvr: To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1356558/+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
