[Bug 1751517] Re: ubuntu bionic grub can't boot zstd compressed filesystem

[Constantine]

> Another option:
> Archlinux uses this patched grub version:
> 
> https://github.com/Antynea/grub-btrfs

This is doubly wrong. Archlinux does not use what you linked, but
instead uses mainline version with some patches
https://git.archlinux.org/svntogit/packages.git/tree/trunk/PKGBUILD?h=packages/grub#n60
Either way, it doesn't work for the topic.

But I (I'm on Archlinux) did try your github version, there's a user
package grub-btrfsᴬᵁᴿ for this one. It does not boot from zstd
compressed partition either.

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https://bugs.launchpad.net/bugs/1751517

Title:
  ubuntu bionic grub can't boot zstd compressed filesystem

Status in grub2 package in Ubuntu:
  Confirmed

Bug description:
  In the /etc/fstab of installed ubuntu bionic system I specified compress=zstd for the btrfs root filesytem
  After runing 'sudo btrfs filesystem defragment -r -czstd /' the system booted to a grub shell.  I could boot again by running 'sudo btrfs filesystem defragment -r -clzo /' and specifying compress=lzo in the /etc/fstab.
  There is also a new bug in the btrfs tools:
  btrfs does recognize the option '-clzo' but not '-c lzo'.

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