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[Chris J Arges <1478672@xxxxxxxxxxxxxxxxxx>]

1) Does this happen even with a clean libvirt install? I.e. install Ubuntu, then install ubuntu-virt-server and see if the crashes happen on libvirtd starting?
2) You could get a crashdump of this when it happens. This may let us know which string is causing the oops and what led up to it.
https://wiki.ubuntu.com/Kernel/CrashdumpRecipe

--chris

** Changed in: linux (Ubuntu)
   Importance: Undecided => High

** Changed in: linux (Ubuntu)
     Assignee: (unassigned) => Chris J Arges (arges)

** Changed in: linux (Ubuntu)
   Importance: High => Medium

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https://bugs.launchpad.net/bugs/1478672

Title:
  Kernel Oops - unable to handle kernel paging request; when starting
  libvirtd

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Kernel Oops occur as soon as I start the libvirtd daemon
  (/usr/bin/libvirtd from package libvirt-bin). This happens only on
  this system (MS-7640/990XA-GD55), but it happens every time I try to
  start libvirtd. Creating/Starting a VM is not needed to trigger this
  oops.

  libvirtd will hang forever after starting: interaction with libvirtd
  isn't possible (i.e. the command 'virsh' will also hang forever).

  I also tried a new mainline kernel (linux-
  image-4.1.3-040103-generic_4.1.3-040103.201507220129_amd64), but that
  gives the same problem.

  Steps to reproduce:
  1. Boot Linux on this hardware
  2. run libvirtd

  I ran a memtest, which gave no errors.

  Kernel cmdline:  ro quiet splash iommu=pt iommu=1
  CPU: AMD FX(tm)-4100 Quad-Core Processor  
  Kernel: Ubuntu 3.13.0-59.98-generic 3.13.11-ckt22 (but also happens on 4.1+)
  Ubuntu version: 14.04.2

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-59-generic 3.13.0-59.98
  ProcVersionSignature: Ubuntu 3.13.0-59.98-generic 3.13.11-ckt22
  Uname: Linux 3.13.0-59-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.11
  Architecture: amd64
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/by-path', '/dev/snd/by-id', '/dev/snd/controlC1', '/dev/snd/pcmC1D0c', '/dev/snd/controlC0', '/dev/snd/hwC0D0', '/dev/snd/pcmC0D0c', '/dev/snd/pcmC0D0p', '/dev/snd/pcmC0D1p', '/dev/snd/pcmC0D2c', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  CRDA: Error: [Errno 2] No such file or directory: 'iw'
  Date: Mon Jul 27 20:59:40 2015
  IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
  MachineType: MSI MS-7640
  ProcFB:
   
  ProcKernelCmdLine: root=UUID=7be2b569-ee1b-4dd2-b8a5-99398f731235 ro quiet splash iommu=pt iommu=1
  PulseList:
   Error: command ['pacmd', 'list'] failed with exit code 1: Home directory not accessible: Permission denied
   No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-59-generic N/A
   linux-backports-modules-3.13.0-59-generic  N/A
   linux-firmware                             1.127.13
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 03/06/2013
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: V23.2
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: 990XA-GD55 (MS-7640)
  dmi.board.vendor: MSI
  dmi.board.version: 4.0
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: MSI
  dmi.chassis.version: 4.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV23.2:bd03/06/2013:svnMSI:pnMS-7640:pvr4.0:rvnMSI:rn990XA-GD55(MS-7640):rvr4.0:cvnMSI:ct3:cvr4.0:
  dmi.product.name: MS-7640
  dmi.product.version: 4.0
  dmi.sys.vendor: MSI

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