[Bug 1748617] Re: package grub-efi-amd64-signed 1.66.16+2.02~beta2-36ubuntu3.16 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Apport retracing service]

*** This bug is a duplicate of bug 1748268 ***
    https://bugs.launchpad.net/bugs/1748268

Thank you for taking the time to report this crash and helping to make
this software better.  This particular crash has already been reported
and is a duplicate of bug #1748268, so is being marked as such.  Please
look at the other bug report to see if there is any missing information
that you can provide, or to see if there is a workaround for the bug.
Additionally, any further discussion regarding the bug should occur in
the other report.  Please continue to report any other bugs you may
find.

** Tags removed: need-duplicate-check

** This bug has been marked a duplicate of bug 1748268
   package grub-efi-amd64-signed 1.66.16+2.02~beta2-36ubuntu3.16 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

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https://bugs.launchpad.net/bugs/1748617

Title:
  package grub-efi-amd64-signed 1.66.16+2.02~beta2-36ubuntu3.16 failed
  to install/upgrade: subprocess installed post-installation script
  returned error exit status 1

Status in grub2-signed package in Ubuntu:
  New

Bug description:
  when i play on dod.gr a pool game Firefox crashes after a while. and
  the whole system is getting very slow

  ProblemType: Package
  DistroRelease: Ubuntu 16.04
  Package: grub-efi-amd64-signed 1.66.16+2.02~beta2-36ubuntu3.16
  ProcVersionSignature: Ubuntu 4.4.0-109.132-generic 4.4.98
  Uname: Linux 4.4.0-109-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.15
  Architecture: amd64
  Date: Sat Feb 10 15:12:38 2018
  DuplicateSignature:
   package:grub-efi-amd64-signed:1.66.16+2.02~beta2-36ubuntu3.16
   Setting up grub-efi-amd64-signed (1.66.16+2.02~beta2-36ubuntu3.16) ...
   grub-install: error: /usr/lib/grub/i386-pc/modinfo.sh doesn't exist. Please specify --target or --directory.
   dpkg: error processing package grub-efi-amd64-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 2016-08-01 (558 days ago)
  InstallationMedia: Ubuntu 16.04.1 LTS "Xenial Xerus" - Release amd64 (20160719)
  RelatedPackageVersions:
   dpkg 1.18.4ubuntu1.3
   apt  1.2.24
  SourcePackage: grub2-signed
  Title: package grub-efi-amd64-signed 1.66.16+2.02~beta2-36ubuntu3.16 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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