[Bug 1931595] [NEW] Compression type 0x3 not supported

[Ken Sharp]

Public bug reported:

Rebooted computer and was immediately greeted with:

"Compression type 0x3 not supported"

This results in an unusable system.

See https://askubuntu.com/q/1056396/ken-sharp

Checked bionic-backports but Grub 2.04 has not been backported. So a
kernel that supports BTRFS ZStd compression is made available, but no
Grub has been made available to boot it!

** Affects: grub2 (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 bionic

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https://bugs.launchpad.net/bugs/1931595

Title:
  Compression type 0x3 not supported

Status in grub2 package in Ubuntu:
  New

Bug description:
  Rebooted computer and was immediately greeted with:

  "Compression type 0x3 not supported"

  This results in an unusable system.

  See https://askubuntu.com/q/1056396/ken-sharp

  Checked bionic-backports but Grub 2.04 has not been backported. So a
  kernel that supports BTRFS ZStd compression is made available, but no
  Grub has been made available to boot it!

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https://bugs.launchpad.net/ubuntu/+source/grub2/+bug/1931595/+subscriptions