[Bug 632775] Re: grub-install (EFI) is not properly setting the prefix

[AnrDaemon]

It seems I have this issue (not as drastic, the installer works... somewhat) with 12.04-a2 CD image.
Trying to boot it in VirtualBox in EFI mode, the message

error: "prefix" is not set

appears briefly, then replaced by "GNU GRUB" menu with 3 usual entries
(LiveCD/Install/Check for defects).

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https://bugs.launchpad.net/bugs/632775

Title:
  grub-install (EFI) is not properly setting the prefix

Status in “grub2” package in Ubuntu:
  Fix Released
Status in “grub2” source package in Maverick:
  Fix Released

Bug description:
  Binary package hint: grub2

  This is a breakout from bug 632642.

  The EFI grub-install is not properly setting up prefix and root.  When
  booted into the EFI system partition, grub starts to load but shows:

  error: unknown filesystem.
  grub rescue>

  Checking the contents of the variables :

  prefix was set to (hd1,gpt1)/boot/grub
  and root was set to hd1,gpt1

  I think these should both be (hd1,gpt2) and hd1,gpt2 respectively
  since the modules and conffile do not live on the EFI system
  partition.

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