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[Joseph Salisbury <joseph.salisbury@xxxxxxxxxxxxx>]

I don't see any crash messages in your log.  Does the Guest OS lock up?
Did this just start happening after a recent update or upgrade?

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

** Tags added: kernel-da-key

** Changed in: linux (Ubuntu)
       Status: Confirmed => Incomplete

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https://bugs.launchpad.net/bugs/1252418

Title:
  Kernel crash if user starts VirtualBox guest OS while KVM guest OS
  running

Status in “linux” package in Ubuntu:
  Incomplete

Bug description:
  Starting VirtualBox guest when any number of guest OS running in KVM
  cause cernel crash (see kern.log). The interesting point is, that
  sometimes the system continues to work after that.

  ProblemType: Bug
  DistroRelease: Ubuntu 12.04
  Package: linux-image-3.2.0-56-generic 3.2.0-56.86
  ProcVersionSignature: Ubuntu 3.2.0-56.86-generic 3.2.51
  Uname: Linux 3.2.0-56-generic x86_64
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  AplayDevices:
   **** List of PLAYBACK Hardware Devices ****
   card 0: CODEC [USB Audio CODEC], device 0: USB Audio [USB Audio]
     Subdevices: 0/1
     Subdevice #0: subdevice #0
  ApportVersion: 2.0.1-0ubuntu17.6
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  aceler     6786 F.... pulseaudio
   /dev/snd/controlC0:  aceler     6786 F.... pulseaudio
   /dev/snd/pcmC0D0p:   aceler     6786 F...m pulseaudio
  CRDA: Error: [Errno 2] Нет такого файла или каталога
  Card0.Amixer.info:
   Card hw:0 'CODEC'/'Burr-Brown from TI USB Audio CODEC at usb-0000:00:1a.0-1.1.1, full speed'
     Mixer name	: 'USB Mixer'
     Components	: 'USB08bb:2900'
     Controls      : 2
     Simple ctrls  : 1
  Card1.Amixer.info:
   Card hw:1 'J'/'A4 TECH A4 TECH USB2.0 PC Camera J at usb-0000:00:14.0-4.3, high speed'
     Mixer name	: 'USB Mixer'
     Components	: 'USB0ac8:c40a'
     Controls      : 3
     Simple ctrls  : 2
  Date: Mon Nov 18 22:39:29 2013
  InstallationMedia: Ubuntu 12.04.1 LTS "Precise Pangolin" - Release amd64 (20120823.1)
  MachineType: Foxconn AT-7000 Series
  MarkForUpload: True
  PciMultimedia:
   
  ProcFB: 0 inteldrmfb
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.2.0-56-generic root=UUID=59fe3771-af8e-41d2-bca0-e79d4debd52b ro quiet splash vt.handoff=7
  PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: No PulseAudio daemon running, or not running as session daemon.
  RelatedPackageVersions:
   linux-restricted-modules-3.2.0-56-generic N/A
   linux-backports-modules-3.2.0-56-generic  N/A
   linux-firmware                            1.79.7
  RfKill:
   0: phy0: Wireless LAN
   	Soft blocked: no
   	Hard blocked: no
  SourcePackage: linux
  StagingDrivers: rts5139 mei
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 11/28/2012
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 4.6.5
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: AT-7000 Series
  dmi.board.vendor: Foxconn
  dmi.board.version: PCB 1.0
  dmi.chassis.asset.tag: To Be Filled By O.E.M.
  dmi.chassis.type: 3
  dmi.chassis.vendor: To Be Filled By O.E.M.
  dmi.chassis.version: To Be Filled By O.E.M.
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr4.6.5:bd11/28/2012:svnFoxconn:pnAT-7000Series:pvrFAB1.0:rvnFoxconn:rnAT-7000Series:rvrPCB1.0:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
  dmi.product.name: AT-7000 Series
  dmi.product.version: FAB 1.0
  dmi.sys.vendor: Foxconn

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