[Bug 1906561] Re: grub-probe fails to recognize valid EXT4 partition

[Nonny Mouse]

Note that the ext4 fs with these features mounts and operates normally.

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https://bugs.launchpad.net/bugs/1906561

Title:
  grub-probe fails to recognize valid EXT4 partition

Status in grub2 package in Ubuntu:
  New

Bug description:
  I have 2 x 1TB SSD, each with 32G ext4 and about 900G btrfs in RAID1
  configuration.  The two ext4 partitions hold mirror image
  installations of Ubuntu Server 20.04, intended as failovers to each
  other.  The only difference is that one has ea_inode and encrypt
  options while the other does not.  On the drive with these options
  grub-mkconfig fails with unknown file system (in grub-probe) and
  attempting to re-boot fails, dropping into grub recovery.  This
  happens on both drives, if the options are enabled, but boots normally
  without them.

  Noticed the problem after an update to the kernel which, of course,
  attempted to update grub.cnf, and also when I attempted to grub-
  install on the drive with the options.

  Knowing of a similar problem in os-probe about two years ago, I
  suspect grub-probe is not recognizing these options in the file system
  itself, and therefore not recognizing an ext4 file system.

  I actually need these features . . .

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: grub2 (not installed)
  ProcVersionSignature: Ubuntu 5.4.0-54.60-generic 5.4.65
  Uname: Linux 5.4.0-54-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.13
  Architecture: amd64
  CasperMD5CheckResult: skip
  Date: Wed Dec  2 13:42:40 2020
  ProcEnviron:
   SHELL=/bin/bash
   LANG=en_US.UTF-8
   TERM=xterm-256color
   PATH=(custom, no user)
  SourcePackage: grub2
  UpgradeStatus: Upgraded to focal on 2020-07-29 (126 days ago)

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