[Bug 836378] Re: Oneiric upgrade, boot hangs at error: symbol not found: grub_divmod64_full

[Jeremy Brown]

I encountered this problem in Ubuntu 11.10 when applying the latest
Software Update.  The updater reported "Grub Upgrade failed" and offered
only a reboot now button.  When the laptop rebooted, there was the grub-
rescue prompt.

This is a single-drive machine with only Ubuntu installed.  I hadn't
made any changes to the drive configuration or to Grub.

>From a user's point of view, this is devastating.  Luckily I have
another machine so I was able to find the boot repair tool via a google
search, but considering that Ubuntu is being marketed as an OS for
unsophisticated users, it is just wrong to brick the PC during a routine
software update.

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https://bugs.launchpad.net/bugs/836378

Title:
  Oneiric upgrade, boot hangs at error: symbol not found:
  grub_divmod64_full

Status in Software Updater:
  Invalid
Status in “grub2” package in Ubuntu:
  Invalid

Bug description:
  Upgraded from Natty to Oneiric on a machine with a two-drive RAID 1
  md0 using do-release-upgrade -d

  The upgrade went fine, but on reboot, the machine simply hangs at:
  error: symbol not found: 'grub_divmod64_full'.
  grub rescue>

  Trying to recover and grab logs now.

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