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

[Earl]

Hirsute build 16 April

Unable to do full install to USB3 stick.

Executing 'grub-install /dev/sdd' failed. This is a fatal error.

This after choosing to do a full erase and let the installer do what it
wishes.

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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)

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