[Bug 1265428] Re: package grub-pc 1.99-21ubuntu3.14 failed to install/upgrade: subprocess installed post-installation script returned error exit status 127

[Karim Hosein]

Problem lies in conflict with grub and kernel 3.8.0-35.

Here is a workaround:

# apt-get purge dose not succeed but synaptic "completely remove" option does
sudo apt-get install synaptic

from synaptic, completely remove grub, grub2, grub-pc, grub-bin, grub-common, etc.
# you can search for 'grub' then sort on 'status' to find what is installed then 'com[letely remove' them.

close synaptic and from the terminal type
sudo apt-get install grub2
sudo update-grub

# Before anything else, update the kernel
sudo apt-get update && sudo apt-get upgrade

now you should be able to install anything you like, including gkvim,
without getting an error message telling you that /etc/default/grub is
not found or is invalid.

You can alsoun-install grub and re-install any other bootloader which
you may have been using such as burg as was the case with me.

This is just a hack around the issue. The issue still exists.

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https://bugs.launchpad.net/bugs/1265428

Title:
  package grub-pc 1.99-21ubuntu3.14 failed to install/upgrade:
  subprocess installed post-installation script returned error exit
  status 127

Status in “grub2” package in Ubuntu:
  Confirmed

Bug description:
  Attempting to install vim using "sudo apt-get install gkvim".  Program
  wseems to be installed, at least the opening screen appears, though I
  have not had a chance to use it yet.  However, I received error
  message, and next time I logged on found I was in Launchpad.

  ProblemType: Package
  DistroRelease: Ubuntu 12.04
  Package: grub-pc 1.99-21ubuntu3.14
  ProcVersionSignature: Ubuntu 3.8.0-29.42~precise1-generic 3.8.13.5
  Uname: Linux 3.8.0-29-generic x86_64
  ApportVersion: 2.0.1-0ubuntu17.6
  Architecture: amd64
  Date: Wed Jan  1 17:53:57 2014
  DuplicateSignature: package:grub-pc:1.99-21ubuntu3.14:subprocess installed post-installation script returned error exit status 127
  ErrorMessage: subprocess installed post-installation script returned error exit status 127
  InstallationMedia: Ubuntu 12.04.3 LTS "Precise Pangolin" - Release amd64 (20130820.2)
  InvalidGrubScript: /etc/default/grub
  MarkForUpload: True
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.8.0-29-generic root=UUID=d6173a15-8f84-43e1-9f4f-d6496458c6ea ro quiet splash vt.handoff=7
  SourcePackage: grub2
  Title: package grub-pc 1.99-21ubuntu3.14 failed to install/upgrade: subprocess installed post-installation script returned error exit status 127
  UpgradeStatus: No upgrade log present (probably fresh install)

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