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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed'
to 'verification-done'.

If verification is not done by one week from today, this fix will be
dropped from the source code, and this bug will be closed.

See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how
to enable and use -proposed. Thank you!


** Tags added: verification-needed-raring

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https://bugs.launchpad.net/bugs/1180419

Title:
  Ringtail on Hyper-V causes BUG: scheduling while atomic

Status in “linux” package in Ubuntu:
  Fix Released
Status in “linux” source package in Raring:
  Fix Released
Status in “linux” source package in Saucy:
  Fix Released

Bug description:
  Ringtail 3.8.0-19-generic on Hyper-v,  bears at least a slight
  resemblance to to #752064

  This is hand copied, as it's not showing up in messages

  [  23.921.954] BUG: scheduling while atomic: swapper/0/0x10000100
  [  168.973600] end request: I/O error, dev sda, sector 16786984
  [  168.973780] Buffer I/O error on device sda1, logical block 2098117

  Similar messages repeat a few times, until it starts complaining about
  an offline device. The CPU is showing pretty high activity.

  Halt from command line works on this system.
  It is only when a shut down command is issued from hyper-v
  --- 
  AlsaDevices:
   total 0
   crw-rw---T 1 root audio 116,  1 May 15  2013 seq
   crw-rw---T 1 root audio 116, 33 May 15  2013 timer
  AplayDevices: Error: [Errno 2] No such file or directory
  ApportVersion: 2.9.2-0ubuntu8
  Architecture: amd64
  ArecordDevices: Error: [Errno 2] No such file or directory
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
  CRDA: Error: [Errno 2] No such file or directory
  DistroRelease: Ubuntu 13.04
  HibernationDevice: RESUME=UUID=67816604-7de5-4ce5-9805-84ecd77d9e63
  IwConfig: Error: [Errno 2] No such file or directory
  Lsusb: Error: command ['lsusb'] failed with exit code 1: unable to initialize libusb: -99
  MachineType: Microsoft Corporation Virtual Machine
  MarkForUpload: True
  Package: linux 3.8.0.19.35
  PackageArchitecture: amd64
  PciMultimedia:
   
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB: 0 VESA VGA
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-19-generic root=UUID=8e612ddd-6458-4783-a7c7-6c6acf6b48ac ro nosplash quiet
  ProcVersionSignature: Ubuntu 3.8.0-19.30-generic 3.8.8
  RelatedPackageVersions:
   linux-restricted-modules-3.8.0-19-generic N/A
   linux-backports-modules-3.8.0-19-generic  N/A
   linux-firmware                            1.106
  RfKill: Error: [Errno 2] No such file or directory
  Tags:  raring
  Uname: Linux 3.8.0-19-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:
   
  dmi.bios.date: 03/19/2009
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 090004
  dmi.board.name: Virtual Machine
  dmi.board.vendor: Microsoft Corporation
  dmi.board.version: 7.0
  dmi.chassis.asset.tag: 1897-8098-1654-4953-6712-7975-54
  dmi.chassis.type: 3
  dmi.chassis.vendor: Microsoft Corporation
  dmi.chassis.version: 7.0
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr090004:bd03/19/2009:svnMicrosoftCorporation:pnVirtualMachine:pvr7.0:rvnMicrosoftCorporation:rnVirtualMachine:rvr7.0:cvnMicrosoftCorporation:ct3:cvr7.0:
  dmi.product.name: Virtual Machine
  dmi.product.version: 7.0
  dmi.sys.vendor: Microsoft Corporation

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