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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/1446464

Title:
  System fails to boot stuck on Scanning for btrfs

Status in linux package in Ubuntu:
  Confirmed

Bug description:
  Ubuntu 15.04 with 3.19.0-15-generic.

  Current status:
  System fails to finish booting with Scanning for btrfs.  If you wait long enough you see:
  INFO: task exe:208 blocked for more than 120 seconds
  ....
  INFO: task btrfs-transacti:230 blocked for more than 120 seconds
  (message repeats every 2 minutes)

  Ctrl-alt-delete does work to reboot system at this stage.
  Booting with upstart still hangs.
  Recovery mode fails to boot as well
  Tried options system.debug-shell (from https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1444070) which got me a few more details

  Story of getting here:  Was playing Team Fortress 2 and Internet went down.   Trying to get network-manager to reload caused some issues.  Eventually decided to reboot.  Hung at reboot and ended up powering down by switch.
  --- 
  ApportVersion: 2.17.2-0ubuntu1
  Architecture: amd64
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC1:  bryan      1626 F.... pulseaudio
   /dev/snd/pcmC0D0p:   bryan      1626 F...m pulseaudio
   /dev/snd/controlC0:  bryan      1626 F.... pulseaudio
  CurrentDesktop: Unity
  DistroRelease: Ubuntu 15.04
  InstallationDate: Installed on 2015-01-08 (102 days ago)
  InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Alpha amd64 (20150108)
  MachineType: BIOSTAR Group TA890GXE
  NonfreeKernelModules: nvidia_uvm nvidia
  Package: linux (not installed)
  ProcFB:
   
  ProcKernelCmdLine: BOOT_IMAGE=/@/boot/vmlinuz-3.19.0-15-generic root=UUID=1bd032ea-0757-4aee-82d4-bbee08fd0eb8 ro rootflags=subvol=@ quiet splash nomdmonddf nomdmonisw
  ProcVersionSignature: Ubuntu 3.19.0-15.15-generic 3.19.3
  RelatedPackageVersions:
   linux-restricted-modules-3.19.0-15-generic N/A
   linux-backports-modules-3.19.0-15-generic  N/A
   linux-firmware                             1.143
  RfKill:
   
  Tags:  vivid
  Uname: Linux 3.19.0-15-generic x86_64
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups: adm autopilot cdrom dip libvirtd lpadmin plugdev sambashare sudo wireshark
  _MarkForUpload: True
  dmi.bios.date: 05/30/2011
  dmi.bios.vendor: American Megatrends Inc.
  dmi.bios.version: 080015
  dmi.board.asset.tag: To Be Filled By O.E.M.
  dmi.board.name: TA890GXE
  dmi.board.vendor: BIOSTAR Group
  dmi.chassis.asset.tag: None
  dmi.chassis.type: 3
  dmi.chassis.vendor: BIOSTAR Group
  dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr080015:bd05/30/2011:svnBIOSTARGroup:pnTA890GXE:pvr:rvnBIOSTARGroup:rnTA890GXE:rvr:cvnBIOSTARGroup:ct3:cvr:
  dmi.product.name: TA890GXE
  dmi.sys.vendor: BIOSTAR Group

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