** Changed in: linux (Ubuntu)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/884219

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

Status in linux package in Ubuntu:
  Fix Released

Bug description:
  I updated my system to Ubuntu 11.10 (oneiric). I have kernel 3.0.0-12.20. 
  The system won't start with this new version. I get always the same message 
(see below).
  For the moment I am starting with Kernel 2.6.38-12.51

  Kernel panic - not syncing: VFS: unable to mount root fs on unknown-bolock 
(0,0)
  Pid: 1, comm: swapper not tainted 3.0.0-12-generic #20-ubuntu
  Call Trace:
  panic+0x91/0x/94
  mount_block_root+0xdc/0x180
  mount_root+0x54/0x59
  prepare_namespace+0x16d/0x1af
  kernel_init+0x140/0x145
  kernel_threat_helper+0x4/0x10
  ?start_kernel+0x3df/0x3df
  ?gs_change+0x13/0x13

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: linux-image-3.0.0-12-generic 3.0.0-12.20
  ProcVersionSignature: Ubuntu 2.6.38-12.51-generic 2.6.38.8
  Uname: Linux 2.6.38-12-generic x86_64
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
  ApportVersion: 1.23-0ubuntu3
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  pat        3754 F.... pulseaudio
   /dev/snd/controlC2:  pat        3754 F.... pulseaudio
  CRDA: Error: [Errno 2] No such file or directory
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xfaef8000 irq 46'
     Mixer name : 'Realtek ALC1200'
     Components : 'HDA:10ec0888,102802b7,00100101'
     Controls      : 34
     Simple ctrls  : 20
  Card1.Amixer.info:
   Card hw:1 'pcsp'/'Internal PC-Speaker at port 0x61'
     Mixer name : 'PC-Speaker'
     Components : ''
     Controls      : 4
     Simple ctrls  : 3
  Card2.Amixer.info:
   Card hw:2 'U0x46d0x8d7'/'USB Device 0x46d:0x8d7 at usb-0000:00:1d.2-2, full 
speed'
     Mixer name : 'USB Mixer'
     Components : 'USB046d:08d7'
     Controls      : 3
     Simple ctrls  : 2
  Card3.Amixer.info:
   Card hw:3 'Generic'/'HD-Audio Generic at 0xfbffc000 irq 47'
     Mixer name : 'ATI R6xx HDMI'
     Components : 'HDA:1002aa01,00aa0100,00100200'
     Controls      : 4
     Simple ctrls  : 1
  Card3.Amixer.values:
   Simple mixer control 'IEC958',0
     Capabilities: pswitch pswitch-joined penum
     Playback channels: Mono
     Mono: Playback [on]
  Date: Mon Oct 31 06:20:29 2011
  HibernationDevice: RESUME=UUID=b72e3b1a-a54f-4361-ba88-fa6093b8f156
  IwConfig: Error: [Errno 2] No such file or directory
  MachineType: DELL Inc. Studio XPS 435T/9000
  ProcEnviron:
   PATH=(custom, user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: root=UUID=6d6b9dd3-3d38-4fee-9c03-9290309246d1 ro quiet 
splash
  RelatedPackageVersions:
   linux-restricted-modules-2.6.38-12-generic N/A
   linux-backports-modules-2.6.38-12-generic  N/A
   linux-firmware                             1.60
  RfKill: Error: [Errno 2] No such file or directory
  SourcePackage: linux
  UdevDb: Error: [Errno 2] No such file or directory
  UpgradeStatus: Upgraded to oneiric on 2011-10-31 (0 days ago)
  dmi.bios.date: 07/28/2009
  dmi.bios.vendor: DELL INC.
  dmi.bios.version: A16
  dmi.board.name: 0X501H
  dmi.board.vendor: DELL Inc.
  dmi.board.version: A02
  dmi.chassis.type: 3
  dmi.chassis.vendor: DELL Inc.
  dmi.modalias: 
dmi:bvnDELLINC.:bvrA16:bd07/28/2009:svnDELLInc.:pnStudioXPS435T/9000:pvr00:rvnDELLInc.:rn0X501H:rvrA02:cvnDELLInc.:ct3:cvr:
  dmi.product.name: Studio XPS 435T/9000
  dmi.product.version: 00
  dmi.sys.vendor: DELL Inc.

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