[Bug 1687441] Re: package shim-signed 1.28+0.9+1474479173.6c180c6-1ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Steve Langasek]

The error in your log is:

Setting up shim-signed (1.28+0.9+1474479173.6c180c6-1ubuntu1) ...
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


Why is /boot/efi not mounted on your system?  This is required for upgrading the bootloader. 

Please attach /etc/fstab from your system.

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

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https://bugs.launchpad.net/bugs/1687441

Title:
  package shim-signed 1.28+0.9+1474479173.6c180c6-1ubuntu1 failed to
  install/upgrade: subprocess installed post-installation script
  returned error exit status 1

Status in shim-signed package in Ubuntu:
  Incomplete

Bug description:
  This package reported an error in the post-installations script while
  upgrading from 16.10 to 17.04

  ProblemType: Package
  DistroRelease: Ubuntu 17.04
  Package: shim-signed 1.28+0.9+1474479173.6c180c6-1ubuntu1
  ProcVersionSignature: Ubuntu 4.10.0-20.22-generic 4.10.8
  Uname: Linux 4.10.0-20-generic x86_64
  .proc.sys.kernel.moksbstate_disabled: 0
  .sys.firmware.efi.efivars.MokSBStateRT-605dab50-e046-4300-abb6-3dd810dd8b23: Error: [Errno 2] No such file or directory: '/sys/firmware/efi/efivars/MokSBStateRT-605dab50-e046-4300-abb6-3dd810dd8b23'
  .sys.firmware.efi.efivars.SecureBoot-8be4df61-93ca-11d2-aa0d-00e098032b8c: 

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