[Bug 1872100] Re: "The GRUB bootloader was previously installed to a disk that is no longer present..."

[Julian Andres Klode]

*** This bug is a duplicate of bug 1872077 ***
    https://bugs.launchpad.net/bugs/1872077

** This bug has been marked a duplicate of bug 1872077
   package grub-efi-amd64-signed 1.140+2.04-1ubuntu24 failed to install/upgrade with mount: /var/lib/grub/esp: special device /, does not exist

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https://bugs.launchpad.net/bugs/1872100

Title:
  "The GRUB bootloader was previously installed to a disk that is no
  longer present..."

Status in update-manager package in Ubuntu:
  Confirmed

Bug description:
  I'm on the 20.04 early testing group. 
  I've been using 20.04 for about a month.
  Today when doing a normal software update 
  1 - the update-manager got stuck in an error message (see attached) and then 
  2 - prompted me saying that "The GRUB bootloader was previously installed to a disk that is no longer present..." (see attached)
  3 - and when I selected that path because it's the only EFI partition I have and press 'Next'
  4 - then a new dialog appears asking if I want to proceed without installing GRUB. 
  5 - when I untick that box and try to proceed trying to install GRUB it then takes me back to step (2) so I'm currently stuck in a loop.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: update-manager 1:20.04.5
  ProcVersionSignature: Ubuntu 5.4.0-23.27-generic 5.4.29
  Uname: Linux 5.4.0-23-generic x86_64
  ApportVersion: 2.20.11-0ubuntu26
  Architecture: amd64
  CasperMD5CheckResult: skip
  CurrentDesktop: ubuntu:GNOME
  Date: Fri Apr 10 16:10:48 2020
  InstallationDate: Installed on 2019-09-04 (218 days ago)
  InstallationMedia: Ubuntu 19.04 "Disco Dingo" - Release amd64 (20190416)
  PackageArchitecture: all
  SourcePackage: update-manager
  UpgradeStatus: No upgrade log present (probably fresh install)

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