[Bug 1791221] Re: package grub-efi-amd64-signed 1.66.18+2.02~beta2-36ubuntu3.18 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Apport retracing service]

** Tags removed: need-duplicate-check

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Title:
  package grub-efi-amd64-signed 1.66.18+2.02~beta2-36ubuntu3.18 failed
  to install/upgrade: subprocess installed post-installation script
  returned error exit status 1

Status in grub2-signed package in Ubuntu:
  New

Bug description:
  kept reporting the same error.  would not send a report.
  dmesg
  [97113.475416] wlp2s0: authenticate with f4:f2:6d:aa:de:2d
  [97113.503654] wlp2s0: send auth to f4:f2:6d:aa:de:2d (try 1/3)
  [97113.506939] wlp2s0: authenticated
  [97113.509851] wlp2s0: associate with f4:f2:6d:aa:de:2d (try 1/3)
  [97113.515995] wlp2s0: RX ReassocResp from f4:f2:6d:aa:de:2d (capab=0x1011 status=0 aid=4)
  [97113.518174] wlp2s0: associated
  [97113.518318] ath: EEPROM regdomain: 0x8348
  [97113.518320] ath: EEPROM indicates we should expect a country code
  [97113.518321] ath: doing EEPROM country->regdmn map search
  [97113.518323] ath: country maps to regdmn code: 0x3a
  [97113.518324] ath: Country alpha2 being used: US
  [97113.518325] ath: Regpair used: 0x3a
  [97113.518326] ath: regdomain 0x8348 dynamically updated by country IE
  [97113.518600] wlp2s0: Limiting TX power to 30 (30 - 0) dBm as advertised by f4:f2:6d:aa:de:2d

  ProblemType: Package
  DistroRelease: Ubuntu 16.04
  Package: grub-efi-amd64-signed 1.66.18+2.02~beta2-36ubuntu3.18
  ProcVersionSignature: Ubuntu 4.15.0-33.36~16.04.1-generic 4.15.18
  Uname: Linux 4.15.0-33-generic x86_64
  ApportVersion: 2.20.1-0ubuntu2.18
  Architecture: amd64
  Date: Thu Sep  6 22:43:00 2018
  ErrorMessage: subprocess installed post-installation script returned error exit status 1
  InstallationDate: Installed on 2017-08-07 (396 days ago)
  InstallationMedia: Ubuntu 16.04.2 LTS "Xenial Xerus" - Release amd64 (20170215.2)
  RelatedPackageVersions:
   dpkg 1.18.4ubuntu1.4
   apt  1.2.27
  SourcePackage: grub2-signed
  Title: package grub-efi-amd64-signed 1.66.18+2.02~beta2-36ubuntu3.18 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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