[rhelv6-list] iPXE from Grub

[Jack Neely]

Folks,

On my managed RHEL machines I usually have a Grub menu option to
re-install the box.  I have recently upgraded this so that the menu
option runs ipxe.lkrn with an embedded script:

    #!ipxe
    :retry_dhcp
    dhcp || goto retry_dhcp
    chain tftp://tftp-server/pxelinux.0

On most machines this work very well.  However, on newer hardware that
supports EFI (such as the Dell R710) when this Grub menu option is
chosen I see the following

    iPXE initialising devices...
    Try to free Memory without Signature

and the machine halts.  These EFI machines are running in BIOS
compatibility mode, and legacy PXE from the BIOS works normally.  (Our
DHCP servers aren't yet setup to handle EFI-PXE at all, yet.)

It seems that no one (or google) knows really anything about what causes
this error message and boot failure.  Any clues?

Thanks,
Jack Neely

-- 
Jack Neely <jjneely at ncsu.edu>
Linux Czar, OIT Campus Linux Services
Office of Information Technology, NC State University
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