[Bug 1956972] [NEW] grub-install fatal error during installation

[Hurky]

Public bug reported:

This happens both to the 21.10 and 20.04.3 versions

I install mdadm and assemble the RAID devices , then I start the
installation and choose to install GRUB on the first drive /dev/sda ,
error says grub-install failed on /dev/sde

ProblemType: Bug
DistroRelease: Ubuntu 20.04
Package: ubiquity 20.04.15.17 [modified: lib/partman/automatically_partition/question]
ProcVersionSignature: Ubuntu 5.11.0-27.29~20.04.1-generic 5.11.22
Uname: Linux 5.11.0-27-generic x86_64
ApportVersion: 2.20.11-0ubuntu27.18
Architecture: amd64
CasperMD5CheckResult: pass
CasperVersion: 1.445.1
Date: Mon Jan 10 15:39:40 2022
InstallCmdLine: file=/cdrom/preseed/kubuntu.seed maybe-ubiquity initrd=/casper/initrd quiet splash --- maybe-ubiquity
LiveMediaBuild: Kubuntu 20.04.3 LTS "Focal Fossa" - Release amd64 (20210819.1)
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: grub-installer (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug focal kubuntu ubiquity-20.04.15.17

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https://bugs.launchpad.net/bugs/1956972

Title:
  grub-install fatal error during installation

Status in grub-installer package in Ubuntu:
  New

Bug description:
  This happens both to the 21.10 and 20.04.3 versions

  I install mdadm and assemble the RAID devices , then I start the
  installation and choose to install GRUB on the first drive /dev/sda ,
  error says grub-install failed on /dev/sde

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: ubiquity 20.04.15.17 [modified: lib/partman/automatically_partition/question]
  ProcVersionSignature: Ubuntu 5.11.0-27.29~20.04.1-generic 5.11.22
  Uname: Linux 5.11.0-27-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.18
  Architecture: amd64
  CasperMD5CheckResult: pass
  CasperVersion: 1.445.1
  Date: Mon Jan 10 15:39:40 2022
  InstallCmdLine: file=/cdrom/preseed/kubuntu.seed maybe-ubiquity initrd=/casper/initrd quiet splash --- maybe-ubiquity
  LiveMediaBuild: Kubuntu 20.04.3 LTS "Focal Fossa" - Release amd64 (20210819.1)
  ProcEnviron:
   TERM=xterm-256color
   PATH=(custom, no user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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