[Bug 1029393] Re: E: grub-pc: subprocess installed post-installation script returned error exit status 20

[Marcus Tomlinson]

This release of Ubuntu is no longer receiving maintenance updates. If
this is still an issue on a maintained version of Ubuntu please let us
know.

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

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Title:
  E: grub-pc: subprocess installed post-installation script returned
  error exit status 20

Status in grub2 package in Ubuntu:
  Incomplete

Bug description:
  Setting up grub-pc (1.99-22ubuntu1) ...
  dpkg: error processing grub-pc (--configure):
   subprocess installed post-installation script returned error exit status 20
  No apport report written because MaxReports has already been reached
                                                                      Errors were encountered while processing:
   grub-pc
  E: Sub-process /usr/bin/dpkg returned an error code (1)
  A package failed to install.  Trying to recover:
  Setting up grub-pc (1.99-22ubuntu1) ...
  dpkg: error processing grub-pc (--configure):
   subprocess installed post-installation script returned error exit status 128
  Errors were encountered while processing:
   grub-pc

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