[Bug 1575092] Re: Reinstall of Ubuntu 16.04 over failed upgrade of Ubuntu (15.10 -> 16.04) results in grub installation failure

[Phillip Susi]

IIRC, the options are Continue ( in EFI mode ) and Cancel ( and use bios
mode instead ).  The buttons probably could be worded a little better.

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https://bugs.launchpad.net/bugs/1575092

Title:
  Reinstall of Ubuntu 16.04 over failed upgrade of Ubuntu (15.10 ->
  16.04) results in grub installation failure

Status in grub-installer package in Ubuntu:
  Invalid

Bug description:
  I had a working Ubuntu 15.10 installation (which itself was an upgrade
  from an earlier release). Got prompted if I wanted to upgrade to 16.04
  and answered yes. During the upgrade several dozen packages failed to
  install, many of them libraries. I was eventually left with a system
  that would not work so I decided to reinstall the OS, keeping existing
  user files intact (booting from USB). The install proceeded without
  problems but at the end I got the error message "The 'grub-efi-
  amd64-signed' package failed to install into / target/." Now I'm left
  with a computer without any working OS.

  ProblemType: Bug
  DistroRelease: Ubuntu 16.04
  Package: ubiquity 2.21.63
  ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
  Uname: Linux 4.4.0-21-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  CasperVersion: 1.376
  Date: Tue Apr 26 17:51:26 2016
  InstallCmdLine: BOOT_IMAGE=/casper/vmlinuz.efi file=/cdrom/preseed/ubuntu.seed boot=casper only-ubiquity quiet splash --- cdrom-detect/try-usb=true noprompt
  LiveMediaBuild: Ubuntu 16.04 LTS "Xenial Xerus" - Release amd64 (20160420.1)
  ProcEnviron:
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=en_US.UTF-8
  SourcePackage: grub-installer
  UpgradeStatus: No upgrade log present (probably fresh install)

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