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

[Earl]

wrote 21.04 build 21 March to USB stick after checking image with gtkhash. Used this LIVE USB to install 21.04 to a second USB stick, sdb. Normal installation until near the end when BOOM 
Unable to install grub in dev/sdb (as superuser). Executing 'grub-install /dev/sdb' failed. This is a fatal error.  Only these 2 USB drives sda and sdb are present, no other drives.

This time I freshly created with gparted a GPT USB and a smaller ext4
partition for root, a larger ext4 partition for /home, and a small EFI
partition flagged as esp,boot. Boot loader marked as sdb. No files
anywhere. Since freshly formatted with Gparted, no formatting during
installation.  sda is the LIVE USB stick.  Choice was 'other'
installation, not a full erase and install.

This prevents me from test driving 21.04 as a full install.

-- 
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