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

[Mike Ferreira]

Since it is also built for Mantic, I would expect it works for Mantic
Also. (Will confirm later.)

I spun up a Jammy ZFS image. Changed the sources list to Noble. Added
the PPA. Installed packages 'grub2 & shim'... Let it pull in the depends
it needed. Change the sources.list back to jammy. Did some snapshots of
bpool. Reconfigured grub, as it would do in an update... It said that
was successful, so at that point was hopeful. Had fingers crossed.

Rebooted, failed. Booted straight to BIOS. Shutdown > Cold boot >
Failed. Booted straight to BIOS.

So Grub2 2.12 works for the problems with Mantic and Noble, but not as a
fix to Jammy 22.04.

That sort of goes back to those last 4 patches (Grub2 related to ZFS)
working to fix this problem for Noble & Mantic, but (somehow) need to be
backported to fix Jammy.

Dang.

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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)

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