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[Brad Figg <brad.figg@xxxxxxxxxxxxx>]

This bug is missing log files that will aid in diagnosing the problem.
>From a terminal window please run:

apport-collect 1452165

and then change the status of the bug to 'Confirmed'.

If, due to the nature of the issue you have encountered, you are unable
to run this command, please add a comment stating that fact and change
the bug status to 'Confirmed'.

This change has been made by an automated script, maintained by the
Ubuntu Kernel Team.

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

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https://bugs.launchpad.net/bugs/1452165

Title:
  currupted btrfs breaks both recovery and boot

Status in linux package in Ubuntu:
  Incomplete

Bug description:
  If btrfs volume is corrupted (separate /home partition, not even /
  !!!) than not only booting ubuntu in normal AND recovery mode is
  impossible but even liveusb fails as well. The recovery drops to shell
  but it's impossible to fix btrfs - there's unkillable mount -t
  btrfs... process hanging and kernel regularly pukes with "btrfs-
  transacti blocked for 120 seconds" message.

  This is beyond horrible - the whole purpose of recovery mode is to fix
  errors like that, errors on partition which is not used to boot from
  (e. g. /home) should never ever break it. Alternatively you could add
  new mode to grub menu - smth like "recovery which actually works" or
  something like that.

  The workaround is to add 'break=premount' to grub command line and fix
  btrfs with 'btrfs check --repair /dev/dm-....' from initramfs.

  Found on xubuntu 15.04 x86_64.

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