[Bug 1753518] Re: package grub-efi-amd64-signed 1.93+2.02-2ubuntu8 failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1

[Fred Palmer]

I updated UEFI from Asus, but same version I was using since April.

Still only can boot with rEFInd from sdc or flash drive with full
install of Ubuntu.

UEFI does not want to see ESP on sda which is mounted by fstab. It changes entries to like drive disconnected. 
And on reboot all new entries only from ESP on sdc are created.

But ran dosfsk on ESP at sda1, and it showed error with dirty bit set,
as soon as I rebooted so shutdown was not correct.

Also tried manually unmounting my ESP at sda1 and immediately shutting
down, but same issue. UEFI would not see ESP on sda1 and dirty bit set
again. And all new entries in UEFI from sdc's ESP files.

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Title:
  package grub-efi-amd64-signed 1.93+2.02-2ubuntu8 failed to
  install/upgrade: installed grub-efi-amd64-signed package post-
  installation script subprocess returned error exit status 1

Status in grub2-signed package in Ubuntu:
  Confirmed

Bug description:
  thierry at ingatech-XPS-13-9343:~$ LC_ALL=C sudo apt dist-upgrade 
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  Calculating upgrade... Done
  0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
  1 not fully installed or removed.
  After this operation, 0 B of additional disk space will be used.
  Do you want to continue? [Y/n] 
  Setting up grub-efi-amd64-signed (1.93+2.02-2ubuntu8) ...
  Installing for x86_64-efi platform.
  Could not delete variable: Invalid argument
  grub-install: error: efibootmgr failed to register the boot entry: Block device required.
  dpkg: error processing package grub-efi-amd64-signed (--configure):
   installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1
  Errors were encountered while processing:
   grub-efi-amd64-signed
  E: Sub-process /usr/bin/dpkg returned an error code (1)

  ProblemType: Package
  DistroRelease: Ubuntu 18.04
  Package: grub-efi-amd64-signed 1.93+2.02-2ubuntu8
  ProcVersionSignature: Ubuntu 4.15.0-10.11-generic 4.15.3
  Uname: Linux 4.15.0-10-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.20.8-0ubuntu10
  Architecture: amd64
  Date: Mon Mar  5 15:49:17 2018
  ErrorMessage: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1
  InstallationDate: Installed on 2017-11-17 (107 days ago)
  InstallationMedia: Ubuntu 17.10 "Artful Aardvark" - Release amd64 (20171018)
  Python3Details: /usr/bin/python3.6, Python 3.6.4+, python3-minimal, 3.6.4-1
  PythonDetails: /usr/bin/python2.7, Python 2.7.14+, python-minimal, 2.7.14-4
  RelatedPackageVersions:
   dpkg 1.19.0.5ubuntu1
   apt  1.6~alpha7ubuntu2
  SourcePackage: grub2-signed
  Title: package grub-efi-amd64-signed 1.93+2.02-2ubuntu8 failed to install/upgrade: installed grub-efi-amd64-signed package post-installation script subprocess returned error exit status 1
  UpgradeStatus: Upgraded to bionic on 2018-03-01 (3 days ago)

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