[Bug 1931595] Re: Compression type 0x3 not supported

[Julian Andres Klode]

grub 2.04 is used on UEFI systems (via grub2-unsigned and grub2-signed),
so you can make this work on modern hardware. That said, that's somewhat
accidental side effect of upgrading to 2.04 for UEFI, and not a
conscious decision on anyone's part.

** Changed in: grub2 (Ubuntu)
       Status: New => Invalid

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Title:
  Compression type 0x3 not supported

Status in grub2 package in Ubuntu:
  Invalid

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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