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

[Ken Sharp]

Neither grub2-signed nor grub2-unsigned exist in the repository.
https://packages.ubuntu.com/search?suite=bionic-updates,bionic,bionic-backports&arch=amd64&searchon=names&keywords=grub2

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

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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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