[Bug 1868664] [NEW] grub 2.04 can't read f2fs volume

[Blastoff]

Public bug reported:

Focal includes grub 2.04 which brings support for f2fs.
I created a new Focal install with an f2fs volume as root, however grub is unable to read the volume at all and so cannot get the volume's UUID or read from the grub folder.

The volume is visible and automounted under media when I boot from the
Focal USB installer image. All files show up and the drive behaves fine
in the USB installer environment.

At the grub command prompt, (hd0,gpt3) is the f2fs partition.
grub> ls (hd0,gpt3)
        Partition hd0,gpt3: No known filesystem detected - Partition start at 103424KiB - Total size 56114176KiB


$ lsb_release -rd
Description: Ubuntu Focal Fossa (development branch)
Release: 20.04

$ apt-cache policy grub2
grub2:
  Installed: 2.04-1ubuntu22
  Candidate: 2.04-1ubuntu22
  Version table:
*** 2.04-1ubuntu22 500
       500 http://archive.ubuntu.com focal/universe amd64 Packages
       100 /var/lib/dpkg/status

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


** Tags: f2fs focal grub grub2

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https://bugs.launchpad.net/bugs/1868664

Title:
  grub 2.04 can't read f2fs volume

Status in grub2 package in Ubuntu:
  New

Bug description:
  Focal includes grub 2.04 which brings support for f2fs.
  I created a new Focal install with an f2fs volume as root, however grub is unable to read the volume at all and so cannot get the volume's UUID or read from the grub folder.

  The volume is visible and automounted under media when I boot from the
  Focal USB installer image. All files show up and the drive behaves
  fine in the USB installer environment.

  At the grub command prompt, (hd0,gpt3) is the f2fs partition.
  grub> ls (hd0,gpt3)
          Partition hd0,gpt3: No known filesystem detected - Partition start at 103424KiB - Total size 56114176KiB

  
  $ lsb_release -rd
  Description: Ubuntu Focal Fossa (development branch)
  Release: 20.04

  $ apt-cache policy grub2
  grub2:
    Installed: 2.04-1ubuntu22
    Candidate: 2.04-1ubuntu22
    Version table:
  *** 2.04-1ubuntu22 500
         500 http://archive.ubuntu.com focal/universe amd64 Packages
         100 /var/lib/dpkg/status

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