[Bug 1774532] Re: fresh install of 18.04 grub fails to install

[anewbie]

I think this should be reopened. I just ran into the same issue here are the details:
-
I used a 18.04 iso; the ssd had never been used - i select custom setup so i can create partition sizes. The 18.04 installer chooses to use fat filesystem and then fails install grup.

Clearly there is a bug here that it is creating the wrong kind of
partition and then failing. The system itself is configured to use uefi
boot or legacy (required for usb boot). You mark this invalid because
the disk ends up being configured to boot in bios mode but that is in
fact the bug. We should be able to partition the disk as we see fit but
the install process should create an appropriate partition table to
install grub.

** Changed in: grub-installer (Ubuntu)
       Status: Invalid => New

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https://bugs.launchpad.net/bugs/1774532

Title:
  fresh install of 18.04 grub fails to install

Status in grub-installer package in Ubuntu:
  New

Bug description:
  Trying to do a fresh install. The disk was partitioned with 40GB /
  16GB swap and 80 GB /home

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubiquity 18.04.14 [modified: lib/partman/automatically_partition/question]
  ProcVersionSignature: Ubuntu 4.15.0-20.21-generic 4.15.17
  Uname: Linux 4.15.0-20-generic x86_64
  ApportVersion: 2.20.9-0ubuntu7
  Architecture: amd64
  CasperVersion: 1.394
  Date: Thu May 31 18:25:02 2018
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash ---
  LiveMediaBuild: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426)
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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