[Bug 978464] Re: Upgrade 10.04 to 12.04 Beta 2 failed, grub issue

[Ante Karamatić]

It's probably the same issue. During an upgrade, I've got asked if I
wish to continue without installing grub. Since answering No would
result in broken upgrade, I've answered yes. On reboot, grub dropped to
a shell. It was obvious that this was grub from 10.04 (1.98) and that
upgrade never installed new grub into MBR. Installing grub with
'install-grub /dev/vda' solved the problem. Note that this is
virtualized system; not sure if that changes anything.

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https://bugs.launchpad.net/bugs/978464

Title:
  Upgrade 10.04 to 12.04 Beta 2 failed, grub issue

Status in “grub2” package in Ubuntu:
  Confirmed

Bug description:
  I upgraded a 10.04 to 12.04 Beta 2.

  After the compulsory reboot, I ended up stuck on a GRUB shell.

  GRUB didn't get properly updated

  Screen shot is attached.

  I know how to pass that problem manually by upgrading grub
  configuration by hand using a LiveCD.. But obviously, for your lambda
  users it's going to be a massive blocker.

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