[Bug 2051999] Re: Grub2 2.06 has upstream bug that results in Non-booting with ZFS after snapshot of bpool.

[Mike Ferreira]

Forgot to mention... Those "@feature" changes, that are suspected as
being the problems when enabled... unfortunately cannot be done on an
already created bpool. Those can only be set at pool "creation time".

So I'm working on a script to recreate bpool which those specific option
settings from the existing bpool, offline from an installer LiveUSB,
environment.

If I try it from online, it will not export the bpool. It just says
"busy". Using an additional USB flash drive to temporarily hold the
backup from bpool to destroy and recreate the bpool.

That is the path I'm investigating and testing currently. That currently
is, in the absence of a Grub2 2.12 that works with those conditions.

If the new Grub2 2.12 does work with the older option setting, then a
lot of thigs will be resolved, and a work-around will not be needed to
fix existing installs nor new options set in ubuntu-desktop-installer.

I installed just Grub 2.12~rc1 to 22.04.3 with the associated long line
of depends. It wasn't pretty. And it did not correct the problem. That
was not an answer to recommend.

But at this point in time, because of Grub 2.12 not building and is
vaporware. We don't have enough here to test, and make informed
decisions.

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to grub2-unsigned in Ubuntu.
https://bugs.launchpad.net/bugs/2051999

Title:
  Grub2 2.06 has upstream bug that results in Non-booting with ZFS after
  snapshot of bpool.

Status in grub2 package in Ubuntu:
  Confirmed
Status in grub2-unsigned package in Ubuntu:
  Confirmed
Status in zfs-linux package in Ubuntu:
  New

Bug description:
  There is an upstream Bug with Grub where if you create snapshots of bpool, it results in a non-booting System. The problem was found to be an upstream Bug with Grub2:
  https://savannah.gnu.org/bugs/index.php?64297

  Multiple Ubuntu 22.04.3 Users Affected:
  https://ubuntuforums.org/showthread.php?t=2494397&highlight=zfs+grub+bug
  https://ubuntuforums.org/showthread.php?t=2494957

  Brought up as an issue at OpenZFS:
  https://github.com/openzfs/zfs/issues/13873

  If you look at this comment (https://github.com/openzfs/zfs/issues/13873#issuecomment-1892911836), if was found the Savanaugh at GNU released a fix for it in Grub2 2.12, here:
  https://git.savannah.gnu.org/cgit/grub.git/log/grub-core/fs/zfs/zfs.c

  Ubuntu Jammy 22.04.3 is Grub2 2.06. We need to backported this patch
  to Grub2 2.06 so that Users are not caught of in this bug for or
  currently supported LTS Release.

  ProblemType: Bug
  DistroRelease: Ubuntu 22.04
  Package: grub-efi-amd64 2.06-2ubuntu14.4
  ProcVersionSignature: Ubuntu 6.2.0-39.40~22.04.1-generic 6.2.16
  Uname: Linux 6.2.0-39-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair nvidia_modeset nvidia
  ApportVersion: 2.20.11-0ubuntu82.5
  Architecture: amd64
  CasperMD5CheckResult: unknown
  CurrentDesktop: GNOME
  Date: Thu Feb  1 16:40:28 2024
  InstallationDate: Installed on 2021-09-23 (861 days ago)
  InstallationMedia: Ubuntu 20.04.3 LTS "Focal Fossa" - Release amd64 (20210819)
  SourcePackage: grub2-unsigned
  UpgradeStatus: Upgraded to jammy on 2022-08-17 (533 days ago)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/2051999/+subscriptions