[Bug 1574104] Re: grub-install: error: cannot find EFI directory. package shim-signed 1.12+0.8-0ubuntu2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Steve Langasek]

Your bug report shows that you are running on a UEFI system (efibootmgr
runs successfully); you previously had Ubuntu 15.10 installed, with all
the corresponding UEFI bootloader packages having been installed without
problems; and your ESP (EFI system partition) is not mounted at
/boot/efi.

So why is /boot/efi not mounted on your system?

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

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Title:
  grub-install: error: cannot find EFI directory. 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:
  Incomplete

Bug description:
  Setting up shim-signed (1.12+0.8-0ubuntu2) ...
  Installing for x86_64-efi platform.
  grub-install: error: cannot find EFI directory.
  dpkg: error processing package shim-signed (--configure):
   subprocess installed post-installation script returned error exit status 1
  Errors were encountered while processing:
   shim-signed

  ProblemType: Package
  DistroRelease: Ubuntu 16.04
  Package: shim-signed 1.12+0.8-0ubuntu2
  ProcVersionSignature: Ubuntu 4.2.0-35.40-generic 4.2.8-ckt5
  Uname: Linux 4.2.0-35-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2
  Architecture: amd64
  BootEFIContents:
   fw
   fwupx64.efi
  Date: Sat Apr 23 08:57:34 2016
  ErrorMessage: subprocess installed post-installation script returned error exit status 1
  InstallationDate: Installed on 2014-12-17 (493 days ago)
  InstallationMedia: Ubuntu 14.10 "Utopic Unicorn" - Release amd64 (20141022.1)
  RelatedPackageVersions:
   dpkg 1.18.4ubuntu1
   apt  1.2.10ubuntu1
  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: Upgraded to xenial on 2016-04-23 (0 days ago)

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