[Bug 563895] Re: grub2 fails to boot or install when an LVM snapshot exists

[nutznboltz]

Interesting dates in the life of LP: #563895

March 21, 2010 - Reported as Debian #574863
April 4, 2010 (elapsed 14 days) Reported as LP: #563895
June 2, 2010 (elapsed 73 days) Fix committed into Debian and Debian bug closed.
July 5, 2010 (elapsed 106 days) Fix committed in Ubuntu 10.10 (Maverick)
September 10, 2011 (538 days) Complaint (not by me) in LP #563895 using the words "not having a fix for this in "LTS" after more than a year makes me sad"
November 8, 2011 (597 days) I convert bug into SRU request with debdiff of patch and PPA with patched grub2 packages.
November 14, 2011 (604 days) by submitting this question I am able to get someone to acknowledge that this bug needs work.
January 20, 2012 (670 days) day which I, the only person on Earth who is going to know enough to do the testing, is referred to by Marvin Pitt as "anyone else affected".

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https://bugs.launchpad.net/bugs/563895

Title:
  grub2 fails to boot or install when an LVM snapshot exists

Status in “grub2” package in Ubuntu:
  Fix Released
Status in “grub2” source package in Lucid:
  Fix Committed
Status in “grub2” package in Debian:
  Fix Released

Bug description:
  SRU Justification:

  Impact: When /boot and / are in an LVM VG and a snapshot is made of an
  LVM LV in that VG the system will not boot and grub can not be
  modified (updated, reinstalled) until all snapshots are removed.

  Testcase:

  Binary package hint: grub2

  Steps to reproduce:

  - (Lucid beta2 installed from CD)
  - Take a snapshot of any volume
  - on reboot:
    error: fd0 read error.
    error: no such disk.
    grub rescue>
  - Use the rescue cd to get a root shell
  - Remove the snapshot and reboot
  Now, the system boots. Create a new snapshot to repeat.

  The system has 2 SATA disks in mdadm RAID1 configuration with 1 lvm
  volume on top and no 'normal' partitions.

  Also see Comment #6
  https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/563895/comments/6

  Fix: See debdiff patch
  https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/563895/+attachment/2589269/+files/grub2_1.98-1ubuntu12.1.debdiff

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