[Bug 1020446] Re: grub-efi 32 bits fails on 64bits computer

[Phillip Susi]

I actually came across a blog entry by Matthew Garret ( redhat kernel
guru ) today pleading to hardware vendors not to release 32 bit uefi
only systems where he states the same thing:

http://mjg59.dreamwidth.org/26734.html

I looked over the UEFI specs a bit today too and came to the conclusion
that it is technically possible for a UEFI firmware to support both 32
and 64 bit, I would be difficult with no real gain so I would be very
surprised to see anyone do it.  After all, the target platform of choice
( Windows ) only supports UEFI on the 64 bit release and 32 bit
operating systems can boot just fine in legacy mode so there just isn't
any incentive to make a dual arch firmware.

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https://bugs.launchpad.net/bugs/1020446

Title:
  grub-efi 32 bits fails on 64bits computer

Status in “grub2” package in Ubuntu:
  Invalid

Bug description:
  On a 64bits EFI computer (with GPT disk) with pre-installed 64bits
  Windows7. Laptop ASUS N76VZ-V2G-T1002V.

  1) Installed Ubuntu 12.04 32bits in dual-boot, then installed grub-
  efi. Result: http://paste.ubuntu.com/1069331 (see the 3 efi files on
  sda1). At reboot, GRUB menu does not appear, even when setting the EFI
  BIOS on /efi/ubuntu/boot.efi  , or /efi/ubuntu/grubia32.efi .

  2) Removed the Ubuntu32bits partitions, and replaced it by Ubuntu
  64bits. Result: http://paste.ubuntu.com/1072125 (see the new
  /efi/ubuntu/grubx64.efi file). At reboot, the GRUB menu appears and
  allows to boot Ubuntu.

  Original thread in French: http://forum.ubuntu-
  fr.org/viewtopic.php?pid=9878051#p9878051

  Don't hesitate to ask more informations.

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