Hallo. I was successful in UEFI boot and install, here are details:

1) Cobbler server : 2.6.9
  source: ?, ?
  build time: Fri Jun 12 07:42:24 2015

Cobbler is installed on Oracle Linux 6.6

2) I am installing Oracle Linux R6-U6-x86_64 on the Oracle Server x3-2

3) DHCP service is provided by another box, the config is:

host my-hostname.domain.com {
      hardware ethernet 00:10:e0:aa:aa:aa;
      fixed-address 10.xx.xx.xx;
      next-server 10.yy.yy.yy; # my cobbler server
      filename "/grub/BOOTX64.efi";
      }

4) How to find proper BOOTX64.efi file, read the doc: http://docs.oracle.com/cd/E37670_01/E41137/E41137.pdf

See the paragraph 1.4.7 (starts on page 9), the page 10 talks about UEFI-based PXE client. This is the key: UEFI-based PXE clients can use the BOOTX64.efi boot loader, which is available as EFI/BOOT/BOOTX64.efi from the Oracle Linux 6 Update 6 Media Pack DVD image.

So I placed BOOTX64.efi in <my_cobbler_server>:/var/lib/tftpboot/grub/


5) I also have the file splash.xpm.gz in <my_cobbler_server>:/var/lib/tftpboot/grub/

6) The file /var/lib/tftpboot/grub/00:10:e0:aa:aa:aa looks like

timeout=10
splashimage=(nd)/splash.xpm.gz
title OL-R6-U6-x86_64-UEFI
    root (nd)
kernel /images/OL-R6-U6-x86_64/vmlinuz ksdevice=bootif lang= text ks=http://my_cobbler_server/cblr/svc/op/ks/system/host_name
    initrd /images/OL-R6-U6-x86_64/initrd.img

7) The kickstart file is

# ks for OL 6.6 UEFI
install
text
url --url=http://10.yy.yy.yy/cobbler/links/OL-R6-U6-x86_64
lang en_US.UTF-8
keyboard us
rootpw --iscrypted $1$zw2wh8P1$zZMsVBx4.HbZNxM8p1uPX1
firewall --disabled
authconfig --enableshadow --enablemd5
selinux --disabled
timezone --utc America/Los_Angeles
reboot
bootloader --location=partition
clearpart --all --initlabel
part /boot/efi --fstype=vfat --size=200 --asprimary --ondisk=sda
part /boot --fstype=ext4 --size=500 --label=/boot --asprimary --ondisk=sda
part / --fstype=ext4 --size=8192 --grow --maxsize=51200 --label=/ --ondisk=sda
part /var --fstype=ext4 --size=4096 --label=/var --ondisk=sda
part /u01 --fstype=ext3 --size=4096 --label=/u01 --ondisk=sda
part swap --size=16384 --label=swap --ondisk=sda
%packages
@base
@core
device-mapper-multipath
kexec-tools
net-tools
pciutils
sysfsutils
system-config-kickstart
wget
lsscsi
nfs-utils

8) Works for me. Let me know if you need any other detail?

--
Thanks,
Zarko

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