[Bug 1800558] Re: Ubuntu 18.04.1 installer crashes after "Could not install grub-efi-amd64-signed to /target/" (sic)

[TEN]

Workaround from
https://ubuntuforums.org/showthread.php?t=2346196&page=2&p=13723151#post13723151
no longer applicable to 18.04.1: fails though online updates (even 3rd
party) on during install

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https://bugs.launchpad.net/bugs/1800558

Title:
  Ubuntu 18.04.1 installer crashes after "Could not install grub-efi-
  amd64-signed to /target/" (sic)

Status in grub-installer package in Ubuntu:
  New

Bug description:
  i5-4200M (2.5GHz*4) 64-bit Lenovo ideapad, 500GB HDD

  https://bugs.launchpad.net/ubuntu/+source/grub-installer/+bug/1497033
  requests "If your install crashes, allow the installer to file your
  own bug report with your own log files" i.e. not a duplicate

  ProblemType: Bug
  DistroRelease: Ubuntu 18.04
  Package: ubiquity 18.04.14.6 [modified: lib/partman/automatically_partition/question]
  ProcVersionSignature: Ubuntu 4.15.0-29.31-generic 4.15.18
  Uname: Linux 4.15.0-29-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.20.9-0ubuntu7.2
  Architecture: amd64
  CasperVersion: 1.394
  Date: Mon Oct 29 22:53:21 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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