[Bug 1571103] Re: Installing 16.04 beta over 12.04 grub install failed, package shim-signed 1.12+0.8-0ubuntu2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Launchpad Bug Tracker]

[Expired for shim-signed (Ubuntu) because there has been no activity for
60 days.]

** Changed in: shim-signed (Ubuntu)
       Status: Incomplete => Expired

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Title:
  Installing 16.04 beta over 12.04 grub install failed, package shim-
  signed 1.12+0.8-0ubuntu2 failed to install/upgrade: subprocess
  installed post-installation script returned error exit status 1

Status in shim-signed package in Ubuntu:
  Expired

Bug description:
  Tried installing 16.04 beta 2 over my (old) 12.04 LTS - failed at the
  last stage to install grub properly, then got this error when I
  rebooted.

  ProblemType: Package
  DistroRelease: Ubuntu 16.04
  Package: shim-signed 1.12+0.8-0ubuntu2
  ProcVersionSignature: Ubuntu 4.4.0-18.34-generic 4.4.6
  Uname: Linux 4.4.0-18-generic x86_64
  ApportVersion: 2.20-0ubuntu3
  Architecture: amd64
  BootEFIContents:
   fw
   fwupx64.efi
  Date: Fri Apr 15 23:10:41 2016
  EFIBootMgr: Error: command ['efibootmgr', '-v'] failed with exit code 2: efibootmgr: EFI variables are not supported on this system.
  ErrorMessage: subprocess installed post-installation script returned error exit status 1
  RelatedPackageVersions:
   dpkg 1.18.4ubuntu1
   apt  1.2.7
  SourcePackage: shim-signed
  Title: package shim-signed 1.12+0.8-0ubuntu2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
  UpgradeStatus: No upgrade log present (probably fresh install)

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