[Bug 883017] Re: memtest86+ fails on efi systems

[ruediix at gmail.com]

This bug has to do with the EFI version of grub not supporting loading
real mode binaries.

You might be able to workarround this by using the chainloader mode to
bootstrap into another capable bootloader, and then launching memtest86
from the secondary loader.  The .iso image form of memtest86(+) could be
used for this.  However, I am uncertain if even this would work.
(Although, it is worth a try.)

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https://bugs.launchpad.net/bugs/883017

Title:
  memtest86+ fails on efi systems

Status in “memtest86+” package in Ubuntu:
  Confirmed

Bug description:
  memtest86+ fails to load on an amd64 in EFI-mode system using grub-
  efi, I do not know if the error also occurs when using grub-pc on
  amd64.

  Memtest86+ entries are included in the GRUB boot menu. Booting these options results in an error however:
  'error: unknown command 'linux16'.'

  Changing linux16 to linux results in another error:
  'error: zImage doesn't support 32-bit boot.'
  (bug #424506)

  It seems grub-efi (or maybe actually grub on
  amd64(http://www.gnu.org/software/grub/manual/grub.html#linux16) does
  not support linux16.

  I have not found a solution. If there is no solution yet, I would
  suggest not adding the Memtest86+ boot options on amd64 systems (I
  believe efi&64 bit support is planned for memtest86+ version 5)

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