[Bug 1785419] [NEW] I chose "do something else" and set up an ext4 partition, and a 8gb swap partition, but it throws an error installing grub :-(

[Jared Meadows]

Public bug reported:

while installing ubuntu, for my partitions, I selected "Something else",
and I set up a 8gb swap partition, and the remainder as a ext4
partition.  I'm doing all this on my sdb hard drive, as well as setting
up grub on sdb.  however, I get this error when the installer is
installing grub. :-(

The 'grub-efi-amd64-signed' package failed to install into /
target/. Without the GRUB boot loader, the installed system will 
not boot.

Thank you for your help! :)

ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: ubiquity 18.04.14.6
ProcVersionSignature: Ubuntu 4.15.0-29.31-generic 4.15.18
Uname: Linux 4.15.0-29-generic x86_64
ApportVersion: 2.20.9-0ubuntu7.2
Architecture: amd64
CasperVersion: 1.394
Date: Sat Aug  4 12:51:28 2018
InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash ---
LiveMediaBuild: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
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-18.04.14.6 ubuntu

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https://bugs.launchpad.net/bugs/1785419

Title:
  I chose "do something else" and set up an ext4 partition, and a 8gb
  swap partition, but it throws an error installing grub :-(

Status in grub-installer package in Ubuntu:
  New

Bug description:
  while installing ubuntu, for my partitions, I selected "Something
  else", and I set up a 8gb swap partition, and the remainder as a ext4
  partition.  I'm doing all this on my sdb hard drive, as well as
  setting up grub on sdb.  however, I get this error when the installer
  is installing grub. :-(

  The 'grub-efi-amd64-signed' package failed to install into /
  target/. Without the GRUB boot loader, the installed system will 
  not boot.

  Thank you for your help! :)

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubiquity 18.04.14.6
  ProcVersionSignature: Ubuntu 4.15.0-29.31-generic 4.15.18
  Uname: Linux 4.15.0-29-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7.2
  Architecture: amd64
  CasperVersion: 1.394
  Date: Sat Aug  4 12:51:28 2018
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash ---
  LiveMediaBuild: Ubuntu 18.04.1 LTS "Bionic Beaver" - Release amd64 (20180725)
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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