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

[Steve Langasek]

So from David's diff, it appears the grub in lucid did not support $var
syntax consistently, it requires us to use ${var}.  I'm not sure what
the rules are for when $var is supported and when it isn't.  Perhaps
it's only when quoting the variable that we have to use the latter
syntax?

Since we know we aren't going to upgrade the MBR when upgrading from
10.04 to 12.04, we should make sure our grub.cfg remains compatible with
older grub2.

** Changed in: grub2 (Ubuntu)
       Status: Confirmed => Triaged

** Changed in: grub2 (Ubuntu)
     Assignee: (unassigned) => Dmitrijs Ledkovs (dmitrij.ledkov)

** Also affects: grub2 (Ubuntu Precise)
   Importance: Undecided
       Status: New

** Also affects: grub2 (Ubuntu Quantal)
   Importance: Critical
     Assignee: Dmitrijs Ledkovs (dmitrij.ledkov)
       Status: Triaged

** Changed in: grub2 (Ubuntu Precise)
   Importance: Undecided => Critical

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

** Changed in: grub2 (Ubuntu Precise)
     Assignee: (unassigned) => Dmitrijs Ledkovs (dmitrij.ledkov)

** Changed in: grub2 (Ubuntu Precise)
    Milestone: None => ubuntu-12.04.1

** Changed in: grub2 (Ubuntu Quantal)
    Milestone: precise-updates => None

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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:
  Triaged
Status in “grub2” source package in Precise:
  Triaged
Status in “grub2” source package in Quantal:
  Triaged

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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