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[dann frazier <dann.frazier@xxxxxxxxxxxxx>]

It seems like a corruption issue. The machine is sometimes usable for
short periods after this errors occurs, but is otherwise deadlocked.

I did go back to 3.19.0-4.4, and the problem is persisting. I also tried
building a kernel from Linus' git tree and the problem is still there.

 My guess is that something changed outside of the kernel that is now
triggering this bug. Perhaps it was the switch to systemd, or perhaps it
is that I have a juju local provider deployment going on this system now
- or a combination of the two.

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

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https://bugs.launchpad.net/bugs/1440536

Title:
  Oops __d_lookup+0x88/0x194

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  This started happening on a Mustang board after upgrading to
  3.19.0-9.9 and persists in 3.19.0-11.

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.19.0-11-generic 3.19.0-11.11
  ProcVersionSignature: Ubuntu 3.19.0-11.11-generic 3.19.3
  Uname: Linux 3.19.0-11-generic aarch64
  AlsaDevices:
   total 0
   crw-rw---- 1 root audio 116,  1 Dec 31  1969 seq
   crw-rw---- 1 root audio 116, 33 Dec 31  1969 timer
  AplayDevices: Error: [Errno 2] No such file or directory: 'aplay'
  ApportVersion: 2.17-0ubuntu1
  Architecture: arm64
  ArecordDevices: Error: [Errno 2] No such file or directory: 'arecord'
  AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/timer', '/dev/snd/seq'] failed with exit code 1:
  CRDA: Error: [Errno 2] No such file or directory: 'iw'
  Date: Sun Apr  5 08:32:28 2015
  HibernationDevice: RESUME=UUID=014663f6-5135-4075-bf04-d2f42c4fc90b
  IwConfig: Error: [Errno 2] No such file or directory: 'iwconfig'
  Lsusb: Error: command ['lsusb'] failed with exit code 1: unable to initialize libusb: -99
  PciMultimedia:
   
  ProcEnviron:
   TERM=xterm
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcFB:
   
  ProcKernelCmdLine: console=ttyS0,115200n8 ro earlyprintk=uart8250-32bit,0x1c020000
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-11-generic N/A
   linux-backports-modules-3.19.0-11-generic  N/A
   linux-firmware                             1.143
  RfKill: Error: [Errno 2] No such file or directory: 'rfkill'
  SourcePackage: linux
  SystemImageInfo:
   current build number: 0
   device name: ?
   channel: daily
   last update: Unknown
  UpgradeStatus: No upgrade log present (probably fresh install)

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