[Bug 1965827] Re: upgrading from ubuntu 16.06 to 18.04 got this error

[Steve Langasek]

You are trying to upgrade to the release version of shim-signed instead
of the version in bionic-updates.  This is unsupported.  Please fix your
system configuration to include package fixes that were made available
after Ubuntu 18.04 was released by enabling bionic-updates in your apt
sources.

** Changed in: shim-signed (Ubuntu)
       Status: New => Invalid

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Title:
  upgrading from ubuntu 16.06 to 18.04 got this error

Status in shim-signed package in Ubuntu:
  Invalid

Bug description:
  Updating /boot/grub/menu.lst ... done

  /etc/kernel/postinst.d/zz-update-grub:
  Sourcing file `/etc/default/grub'
  Sourcing file `/etc/default/grub.d/50-cloudimg-settings.cfg'
  Generating grub configuration file ...
  Found linux image: /boot/vmlinuz-4.15.0-171-generic
  Found initrd image: /boot/initrd.img-4.15.0-171-generic
  Found linux image: /boot/vmlinuz-4.4.0-210-generic
  Found initrd image: /boot/initrd.img-4.4.0-210-generic
  Found linux image: /boot/vmlinuz-4.4.0-209-generic
  Found initrd image: /boot/initrd.img-4.4.0-209-generic
  Found linux image: /boot/vmlinuz-4.4.0-206-generic
  Found initrd image: /boot/initrd.img-4.4.0-206-generic
  done
  Processing triggers for sgml-base (1.29) ...
  Processing triggers for resolvconf (1.79ubuntu10) ...
  Errors were encountered while processing:
   shim-signed
  Exception during pm.DoInstall():  E:Sub-process /usr/bin/dpkg returned an error code (1)

  ProblemType: Package
  DistroRelease: Ubuntu 18.04
  Package: shim-signed 1.34.9+13-0ubuntu2
  ProcVersionSignature: Ubuntu 4.4.0-210.242-generic 4.4.262
  Uname: Linux 4.4.0-210-generic x86_64
  .proc.sys.kernel.moksbstate_disabled: 0
  ApportVersion: 2.20.9-0ubuntu7.27
  Architecture: amd64
  BootEFIContents:
   BOOTX64.CSV
   grub.cfg
   grubx64.efi
   mmx64.efi
   shimx64.efi
  Date: Mon Mar 21 16:37:06 2022
  EFIBootMgr: Error: command ['efibootmgr', '-v'] failed with exit code 2: EFI variables are not supported on this system.
  EFITables:
   
  ErrorMessage: installed shim-signed package post-installation script subprocess returned error exit status 1
  Python3Details: /usr/bin/python3.6, Python 3.6.9, python3-minimal, 3.6.5-3
  PythonDetails: /usr/bin/python2.7, Python 2.7.17, python-minimal, 2.7.15~rc1-1
  RelatedPackageVersions:
   dpkg 1.19.0.5ubuntu2
   apt  1.6.12ubuntu0.2
  SourcePackage: shim-signed
  Title: package shim-signed 1.34.9+13-0ubuntu2 failed to install/upgrade: installed shim-signed package post-installation script subprocess returned error exit status 1
  UpgradeStatus: Upgraded to bionic on 2022-03-21 (0 days ago)

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