[Bug 996960] Re: package grub-pc 1.98-1ubuntu13 failed to install/upgrade: subprocess installed post-installation script returned error exit status 126

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Title:
  package grub-pc 1.98-1ubuntu13 failed to install/upgrade: subprocess
  installed post-installation script returned error exit status 126

Status in “grub2” package in Ubuntu:
  New

Bug description:
  -------------
  localuser at ubuntu-ald:~$ lsb_release -rd
  Description:	Ubuntu 10.04.4 LTS
  Release:	10.04
  localuser at ubuntu-ald:~$ apt-cache policy grub-pc
  grub-pc:
    Installed: 1.98-1ubuntu13
    Candidate: 1.98-1ubuntu13
  -------------

  I've tried to update a pretty old 10.04 installation to the most fresh.
  Upgrade of grub-pc package was unsuccessful.

  After reboot I've tried one more time:
  ----------
  localuser at ubuntu-ald:~$ sudo apt-get install grub-pc
  Reading package lists... Done
  Building dependency tree       
  Reading state information... Done
  grub-pc is already the newest version.
  grub-pc set to manually installed.
  The following packages were automatically installed and are no longer required:
    linux-headers-2.6.32-33-generic linux-headers-2.6.32-21
    linux-headers-2.6.32-33 linux-headers-2.6.32-21-generic
  Use 'apt-get autoremove' to remove them.
  0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
  1 not fully installed or removed.
  After this operation, 0B of additional disk space will be used.
  Setting up grub-pc (1.98-1ubuntu13) ...
  /var/lib/dpkg/info/grub-pc.config: line 48: .: /etc/default/grub: cannot execute binary file
  dpkg: error processing grub-pc (--configure):
   subprocess installed post-installation script returned error exit status 126
  Errors were encountered while processing:
   grub-pc
  E: Sub-process /usr/bin/dpkg returned an error code (1)
  localuser at ubuntu-ald:~$ sudo dpkg-reconfigure grub
  Package `grub' is not installed and no info is available.
  Use dpkg --info (= dpkg-deb --info) to examine archive files,
  and dpkg --contents (= dpkg-deb --contents) to list their contents.
  /usr/sbin/dpkg-reconfigure: grub is not installed
  localuser at ubuntu-ald:~$ 
  -------------

  ProblemType: Package
  DistroRelease: Ubuntu 10.04
  Package: grub-pc 1.98-1ubuntu13
  ProcVersionSignature: Ubuntu 2.6.32-41.88-generic 2.6.32.59+drm33.24
  Uname: Linux 2.6.32-41-generic i686
  Architecture: i386
  Date: Wed May  9 09:19:43 2012
  ErrorMessage: subprocess installed post-installation script returned error exit status 126
  InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
  SourcePackage: grub2
  Title: package grub-pc 1.98-1ubuntu13 failed to install/upgrade: subprocess installed post-installation script returned error exit status 126

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