[Bug 1679763] Re: package grub-efi-amd64-signed 1.74.2+2.02~beta2-36ubuntu11.2 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[Patrick McEwen]

It appears to be stuck with the upgrade only partially completed

sudo apt upgrade
Reading package lists... Done
Building dependency tree       
Reading state information... Done
Calculating upgrade... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
1 not fully installed or removed.
After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] Y
Setting up grub-efi-amd64-signed (1.74.2+2.02~beta2-36ubuntu11.2) ...
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
Errors were encountered while processing:
 grub-efi-amd64-signed
E: Sub-process /usr/bin/dpkg returned an error code (1)

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Title:
  package grub-efi-amd64-signed 1.74.2+2.02~beta2-36ubuntu11.2 failed to
  install/upgrade: subprocess installed post-installation script
  returned error exit status 1

Status in grub2-signed package in Ubuntu:
  New

Bug description:
  In the process of installing updates and an unusual set of options
  came up regarding whether to upgrade to a newer version of grub or
  keep the same one. I selected the option to upgrade and this error
  happened.

  ProblemType: Package
  DistroRelease: Ubuntu 16.10
  Package: grub-efi-amd64-signed 1.74.2+2.02~beta2-36ubuntu11.2
  ProcVersionSignature: Ubuntu 4.8.0-45.48-generic 4.8.17
  Uname: Linux 4.8.0-45-generic x86_64
  NonfreeKernelModules: nvidia_uvm nvidia_drm nvidia_modeset nvidia
  ApportVersion: 2.20.3-0ubuntu8.2
  Architecture: amd64
  Date: Tue Apr  4 12:37:59 2017
  ErrorMessage: subprocess installed post-installation script returned error exit status 1
  InstallationDate: Installed on 2017-01-27 (67 days ago)
  InstallationMedia: Ubuntu 16.10 "Yakkety Yak" - Release amd64 (20161012.2)
  RelatedPackageVersions:
   dpkg 1.18.10ubuntu1
   apt  1.3.4
  SourcePackage: grub2-signed
  Title: package grub-efi-amd64-signed 1.74.2+2.02~beta2-36ubuntu11.2 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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