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[Simon <makadas_class19d@xxxxxxxxx>]

** Summary changed:

- Kernel panic - not syncing
+ Kernel panic - not syncing:Fatal exception in interrupt

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https://bugs.launchpad.net/bugs/1475941

Title:
  Kernel panic - not syncing:Fatal exception in interrupt

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I've just installed Kubuntu 15.04 and was able to boot into it once
  and update the kernel. Since then, everytime I try to boot into it I
  get the following error message:

  Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-
  block(0,0)

  There might be other error messages before but I cannot see them as
  they pass too fast, and the only messages I see are those shown in the
  attached picture.

  After some trial and error, I've discovered that this bug occurs when
  booting with the quiet option. When I remove it, the kernel boots fine
  most of the time (not everytime, but it's a definite improvement).

  What's happening and how do I prevent it?

  ProblemType: Bug
  DistroRelease: Ubuntu 15.04
  Package: linux-image-3.19.0-22-generic 3.19.0-22.22
  ProcVersionSignature: Ubuntu 3.19.0-22.22-generic 3.19.8-ckt1
  Uname: Linux 3.19.0-22-generic x86_64
  NonfreeKernelModules: nvidia
  ApportVersion: 2.17.2-0ubuntu1.1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  fibonacci   1816 F.... pulseaudio
   /dev/snd/pcmC0D0p:   fibonacci   1816 F...m pulseaudio
   /dev/snd/controlC0:  fibonacci   1816 F.... pulseaudio
  CurrentDesktop: KDE
  Date: Sat Jul 18 20:28:31 2015
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=7e89a62d-4e77-40fc-89ba-42c3b1e76fc0
  InstallationDate: Installed on 2015-07-13 (5 days ago)
  InstallationMedia: Kubuntu 15.04 "Vivid Vervet" - Release amd64 (20150422)
  IwConfig:
   eth0      no wireless extensions.

   lo        no wireless extensions.
  ProcFB:

  ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-3.19.0-22-generic root=UUID=0e051a2e-be67-40a6-8d32-29d4de69aca1 ro rootflags=subvol=@ splash
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-22-generic N/A
   linux-backports-modules-3.19.0-22-generic  N/A
   linux-firmware                             1.143.1
  RfKill:

  SourcePackage: linux
  UdevLog: Error: [Errno 2] File o directory non esistente: '/var/log/udev'
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 12/04/2012
  dmi.bios.vendor: Intel Corp.
  dmi.bios.version: BLH6710H.86A.0160.2012.1204.1156
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: DH67BL
  dmi.board.vendor: Intel Corporation
  dmi.board.version: AAG10189-206
  dmi.chassis.type: 3
  dmi.modalias: dmi:bvnIntelCorp.:bvrBLH6710H.86A.0160.2012.1204.1156:bd12/04/2012:svn:pn:pvr:rvnIntelCorporation:rnDH67BL:rvrAAG10189-206:cvn:ct3:cvr:

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