[Bug 988021] Re: package grub-pc 1.99-21ubuntu3 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 20

[Glyn Modiford Burton]

I ran a "apt-get dist-upgrade && shutdown -h now" and upon powering back
up get a screen titled "GNU GRUB version 1.99-21ubuntu3" and a message
about a minimal BASH functionality with a prompt.

I'm not convinced this is a U/EFI system (HP dc7900 CMT) but it is
running Intel Fake RAID in mirror configuration.  It has been running
and rebooted several times before now.  Granted this was a late Beta of
12.04 though I sure, like myself, many would think updates would push us
to post-release 12.04 LTS version.

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Title:
  package grub-pc 1.99-21ubuntu3 failed to install/upgrade:
  ErrorMessage: subprocess installed post-installation script returned
  error exit status 20

Status in “grub2” package in Ubuntu:
  New

Bug description:
  while upgrading to 12.04

  ProblemType: Package
  DistroRelease: Ubuntu 12.04
  Package: grub-pc 1.99-21ubuntu3
  ProcVersionSignature: Ubuntu 3.0.0-19.33-generic 3.0.27
  Uname: Linux 3.0.0-19-generic x86_64
  NonfreeKernelModules: wl
  ApportVersion: 2.0.1-0ubuntu6
  Architecture: amd64
  Date: Tue Apr 24 22:27:29 2012
  ErrorMessage: ErrorMessage: subprocess installed post-installation script returned error exit status 20
  InstallationMedia: Ubuntu 11.04 "Natty Narwhal" - Release amd64 (20110427.1)
  ProcCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-19-generic root=UUID=ce9ed206-a0d5-477d-8d70-6b1492d68e12 ro quiet splash pcie_aspm=force i915.i915_enable_rc6=1 i915.i915_enable_fbc=1
  SourcePackage: grub2
  Title: package grub-pc 1.99-21ubuntu3 failed to install/upgrade: ErrorMessage: subprocess installed post-installation script returned error exit status 20
  UpgradeStatus: Upgraded to precise on 2012-04-24 (0 days ago)

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