[Bug 1469333] Re: package grub-efi-amd64-signed 1.50+2.02~beta2-26ubuntu1 failed to install/upgrade: subprocess installed post-installation script returned error exit status 1

[dino99]

As a non-LTS release, 15.10 has a 9-month month support cycle and, as
such, the support period is now nearing its end and Ubuntu 15.10 will
reach end of life on Thursday, July 28th. At that time, Ubuntu Security
Notices will no longer include information or updated packages for
Ubuntu 15.10.

Is that problem persist ?

** Changed in: grub2-signed (Ubuntu)
       Status: New => Incomplete

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Title:
  package grub-efi-amd64-signed 1.50+2.02~beta2-26ubuntu1 failed to
  install/upgrade: subprocess installed post-installation script
  returned error exit status 1

Status in grub2-signed package in Ubuntu:
  Incomplete

Bug description:
  Fails with:

  Setting up grub-efi-amd64-signed (1.50+2.02~beta2-26ubuntu1) ...
  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

  ProblemType: Package
  DistroRelease: Ubuntu 15.10
  Package: grub-efi-amd64-signed 1.50+2.02~beta2-26ubuntu1
  ProcVersionSignature: Ubuntu 3.19.0-20.20-generic 3.19.8
  Uname: Linux 3.19.0-20-generic x86_64
  ApportVersion: 2.17.3-0ubuntu4
  Architecture: amd64
  Date: Sat Jun 27 01:25:18 2015
  DuplicateSignature: package:grub-efi-amd64-signed:1.50+2.02~beta2-26ubuntu1:subprocess installed post-installation script returned error exit status 1
  ErrorMessage: subprocess installed post-installation script returned error exit status 1
  InstallationDate: Installed on 2015-05-24 (33 days ago)
  InstallationMedia: Ubuntu-GNOME 15.10 "Wily Werewolf" - Alpha amd64 (20150523)
  RelatedPackageVersions:
   dpkg 1.17.25ubuntu1
   apt  1.0.9.10ubuntu1
  SourcePackage: grub2-signed
  Title: package grub-efi-amd64-signed 1.50+2.02~beta2-26ubuntu1 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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