[Bug 1920009] Re: 21.04_full installation to USB: unable to install GRUB; grub-install failed

[Earl]

Since I can not use U20.04 because of video screen tearing/shredding, I
had the idea to use MINT 18.3 on another computer.  Using MINT 18.3
GParted, I formatted the same USB stick with a fat32 partition and there
was no problem, no error msg saying that the fat32 file system can not
be read as always happens with Umate 21.04.

This is a show stopper if the 21.04 LIVE USB can not read fat32, because
EFI must be fat32.

I would suggest that this is an urgent bug to fix.

-- 
You received this bug notification because you are a member of Ubuntu
Foundations Bugs, which is subscribed to grub-installer in Ubuntu.
https://bugs.launchpad.net/bugs/1920009

Title:
  21.04_full installation to USB: unable to install GRUB; grub-install
  failed

Status in grub-installer package in Ubuntu:
  New

Bug description:
  Installing from 21.04 LIVE USB to another USB. Let the installer do
  everything. It found the existing 20.04 installation and reformatted
  the ext partition, leaving the EFI partition untouched.  Only 2 USB
  drives in system, no other drives of any kind present. When almost
  finished, error appears: unable to install grub in /dev/sbd failed.
  Executing 'grub-install /dev/sdb' failed.

  ProblemType: Bug
  DistroRelease: Ubuntu 21.04
  Package: ubiquity 21.04.9
  ProcVersionSignature: Ubuntu 5.10.0-14.15-generic 5.10.11
  Uname: Linux 5.10.0-14-generic x86_64
  NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair
  ApportVersion: 2.20.11-0ubuntu60
  Architecture: amd64
  CasperMD5CheckResult: pass
  CasperVersion: 1.460
  Date: Thu Mar 18 12:12:12 2021
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu-mate.seed maybe-ubiquity quiet splash ---
  LiveMediaBuild: Ubuntu-MATE 21.04 "Hirsute Hippo" - Alpha amd64 (20210317)
  RebootRequiredPkgs:
   linux-image-5.10.0-14-generic
   linux-base
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1920009/+subscriptions