[Bug 1539177] Re: package grub-pc 2.02~beta2-9ubuntu1.7 failed to install/upgrade: subprocess installed post-installation script returned error exit status 128

[Phillip Susi]

You have added two incorrect lines to the end of /etc/default/grub: you
need to set those options in the existing line which is terminated with
an end quote.


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

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Title:
  package grub-pc 2.02~beta2-9ubuntu1.7 failed to install/upgrade:
  subprocess installed post-installation script returned error exit
  status 128

Status in grub2 package in Ubuntu:
  Invalid

Bug description:
  when I start ubuntu every time it says unknown file system grub rescue
  error.

  ProblemType: Package
  DistroRelease: Ubuntu 14.04
  Package: grub-pc 2.02~beta2-9ubuntu1.7
  ProcVersionSignature: Ubuntu 3.13.0-77.121-generic 3.13.11-ckt32
  Uname: Linux 3.13.0-77-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.19
  Architecture: amd64
  Date: Thu Jan 28 20:49:36 2016
  DuplicateSignature: package:grub-pc:2.02~beta2-9ubuntu1.7:subprocess installed post-installation script returned error exit status 128
  ErrorMessage: subprocess installed post-installation script returned error exit status 128
  InstallationDate: Installed on 2014-10-22 (463 days ago)
  InstallationMedia: Ubuntu 12.04.3 LTS "Precise Pangolin" - Release amd64 (20130820.1)
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-77-generic root=UUID=2168d211-9deb-4320-81f3-b0d94192ee68 ro quiet splash acpi_backlight=vendor
  RelatedPackageVersions:
   dpkg 1.17.5ubuntu5.5
   apt  1.0.1ubuntu2.11
  SourcePackage: grub2
  Title: package grub-pc 2.02~beta2-9ubuntu1.7 failed to install/upgrade: subprocess installed post-installation script returned error exit status 128
  UpgradeStatus: Upgraded to trusty on 2015-04-18 (285 days ago)

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