[Bug 1670222] Re: package shim-signed 1.23+0.9+1474479173.6c180c6-0ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Steve Langasek]

Why is /boot/efi not mounted on your system?

** Changed in: shim-signed (Ubuntu)
   Importance: Undecided => Low

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

** Summary changed:

- package shim-signed 1.23+0.9+1474479173.6c180c6-0ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
+ (/boot/efi not mounted) package shim-signed 1.23+0.9+1474479173.6c180c6-0ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

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https://bugs.launchpad.net/bugs/1670222

Title:
  (/boot/efi not mounted) package shim-signed
  1.23+0.9+1474479173.6c180c6-0ubuntu1 failed to install/upgrade:
  subprocess installed post-installation script returned error exit
  status 1

Status in shim-signed package in Ubuntu:
  Incomplete

Bug description:
  during 16.10 to 17.04 update, this popped up
  GRUB is not maintained by Ubuntu on this computer

  ProblemType: Package
  DistroRelease: Ubuntu 17.04
  Package: shim-signed 1.23+0.9+1474479173.6c180c6-0ubuntu1
  ProcVersionSignature: Ubuntu 4.8.0-39.42-generic 4.8.17
  Uname: Linux 4.8.0-39-generic x86_64
  NonfreeKernelModules: wl nvidia_modeset nvidia
  ApportVersion: 2.20.4-0ubuntu2
  Architecture: amd64
  BootEFIContents:
   fw
   fwupx64.efi
  Date: Mon Mar  6 08:34:18 2017
  DuplicateSignature:
   package:shim-signed:1.23+0.9+1474479173.6c180c6-0ubuntu1
   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
  ErrorMessage: subprocess installed post-installation script returned error exit status 1
  InstallationDate: Installed on 2016-12-02 (93 days ago)
  InstallationMedia: Ubuntu-GNOME 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160720)
  RelatedPackageVersions:
   dpkg 1.18.10ubuntu1
   apt  1.4~rc2
  SourcePackage: shim-signed
  Title: package shim-signed 1.23+0.9+1474479173.6c180c6-0ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1
  UpgradeStatus: Upgraded to zesty on 2017-03-06 (0 days ago)

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