[Bug 1334803] Re: package squid3 3.3.8-1ubuntu6 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 1

[djieno]

I Did this again today. Answering 'no' get you to the menu below where I
unchecked /dev/dm-0 and checked the /dev/vda.

Then I was able to finish successfully and boot into 14.04.1

###The menu that appeared after 'no'

GRUB failed to install to the following devices: /dev/dm-0

The grub-pc package is being upgraded. This menu allows you to select which devices you'd like grub-install to be automatically run for, if any.
 
Running grub-install automatically is recommended in most situations, to prevent the installed GRUB core image from getting out of sync with GRUB modules or grub.cfg.

If you're unsure which drive is designated as boot drive by your BIOS,
it is often a good idea to install GRUB to all of them.

Note: it is possible to install GRUB to partition boot records as well, and some appropriate
partitions are offered here. However, this forces GRUB to use the blocklist mechanism, which makes it less reliable, and therefore is not recommended.

GRUB install devices:

   [*] /dev/vda (3221 MB)              	<-----Checked                                               
   [ ] /dev/dm-0 (2424 MB; openvpn root)      <------------ Unchecked 
   [*] /dev/vda1 (254 MB; ???)     	<-----Checked was already checked

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https://bugs.launchpad.net/bugs/1334803

Title:
  package squid3 3.3.8-1ubuntu6 failed to install/upgrade: ErrorMessage:
  subprocess installed post-installation script returned error exit
  status 1

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