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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

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

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https://bugs.launchpad.net/bugs/1547559

Title:
  Kernel panic - not syncing: VFS: Unable to mount root fs

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  I'm getting a kernel panic when i try with the standard kernel for Ubuntu 14.04.4 LTS: 3.19.0-26.
  It says "Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0)"
  I also use btrfs on the root partition (this may be relevant).
  I attached a photo of the kernel panic screen.

  When i boot into an older kernel (3.13.0-77-generic) everything works.
  Currently I'm on linux-generic-lts-wily (4.2.0-27-generic), because that one also works.

  I made this bug report with the older kernel, so the kernel-version
  from the  automatic debug-information is wrong.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: linux-image-3.13.0-77-generic 3.13.0-77.121
  ProcVersionSignature: Ubuntu 3.13.0-77.121-generic 3.13.11-ckt32
  Uname: Linux 3.13.0-77-generic x86_64
  NonfreeKernelModules: nvidia zfs zunicode zcommon znvpair zavl
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  david      7048 F.... pulseaudio
   /dev/snd/controlC2:  david      7048 F.... pulseaudio
   /dev/snd/controlC0:  david      7048 F.... pulseaudio
  CurrentDesktop: GNOME
  Date: Fri Feb 19 15:49:46 2016
  InstallationDate: Installed on 2015-08-25 (177 days ago)
  InstallationMedia: Ubuntu-GNOME 14.04.3 LTS "Trusty Tahr" - Beta amd64 (20150805)
  IwConfig:
   eth0      no wireless extensions.
   
   eth1      no wireless extensions.
   
   lo        no wireless extensions.
  MachineType: System manufacturer System Product Name
  ProcFB:
   
  ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-3.13.0-77-generic root=UUID=aad80ea5-bb9e-42ce-9082-5ba768811185 ro rootflags=subvol=@ quiet splash
  RelatedPackageVersions:
   linux-restricted-modules-3.13.0-77-generic N/A
   linux-backports-modules-3.13.0-77-generic  N/A
   linux-firmware                             1.127.20
  RfKill:
   0: hci0: Bluetooth
   	Soft blocked: no
   	Hard blocked: no
  SourcePackage: linux
  UpgradeStatus: No upgrade log present (probably fresh install)
  dmi.bios.date: 11/09/2012
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 1709
  dmi.board.asset.tag: To be filled by O.E.M.
  dmi.board.name: P8Z77-V DELUXE
  dmi.board.vendor: ASUSTeK COMPUTER INC.
  dmi.board.version: Rev 1.xx
  dmi.chassis.asset.tag: Asset-1234567890
  dmi.chassis.type: 3
  dmi.chassis.vendor: Chassis Manufacture
  dmi.chassis.version: Chassis Version
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr1709:bd11/09/2012:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnP8Z77-VDELUXE:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
  dmi.product.name: System Product Name
  dmi.product.version: System Version
  dmi.sys.vendor: System manufacturer

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