[Bug 1870834] [NEW] grub2 failed to install during ubuntu installation

[Cody]

Public bug reported:

I was installing Ubuntu 18.04.4. During the grub2 part of the
installation it failed with an error "grub installation failed grub-efi-
amd64-signed package failed to install into /target/." This installation
was on a 1 TB partition that previously had Antergos Linux installed.

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubiquity 18.04.14.14
ProcVersionSignature: Ubuntu 5.3.0-28.30~18.04.1-generic 5.3.13
Uname: Linux 5.3.0-28-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.9
Architecture: amd64
CasperVersion: 1.394.3
Date: Sat Apr  4 14:14:41 2020
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash ---
LiveMediaBuild: Ubuntu 18.04.4 LTS "Bionic Beaver" - Release amd64 (20200203.1)
SourcePackage: grub-installer
UpgradeStatus: No upgrade log present (probably fresh install)

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


** Tags: amd64 apport-bug bionic ubiquity-18.04.14.14 ubuntu

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https://bugs.launchpad.net/bugs/1870834

Title:
  grub2 failed to install during ubuntu installation

Status in grub-installer package in Ubuntu:
  New

Bug description:
  I was installing Ubuntu 18.04.4. During the grub2 part of the
  installation it failed with an error "grub installation failed grub-
  efi-amd64-signed package failed to install into /target/." This
  installation was on a 1 TB partition that previously had Antergos
  Linux installed.

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubiquity 18.04.14.14
  ProcVersionSignature: Ubuntu 5.3.0-28.30~18.04.1-generic 5.3.13
  Uname: Linux 5.3.0-28-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.9
  Architecture: amd64
  CasperVersion: 1.394.3
  Date: Sat Apr  4 14:14:41 2020
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash ---
  LiveMediaBuild: Ubuntu 18.04.4 LTS "Bionic Beaver" - Release amd64 (20200203.1)
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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