Created attachment 1285163 [details]
Example kickstart for 32/64 bit UEFI on x86

I've tested this kickstart with x86_64 and qemu UEFI and it works fine. I don't have any way to test 32bit booting.

I added the following for x86:

grub2-tools-efi
shim-x64
grub2-efi-x64-cdboot
efibootmgr
shim-ia32
grub2-efi-ia32-cdboot


aarch64 should, I think, add:

efibootmgr
grub2-efi-aa64-cdboot
grubby
shim-aa64


ppc64 should be:

grub2-tools
grub2-tools-minimal
grub2-tools-extra
grub2-ppc64

ppc64le should be:

grub2-tools
grub2-tools-minimal
grub2-tools-extra
grub2-ppc64le

*** Bug 1460499 has been marked as a duplicate of this bug. ***

Changes are smaller than I expected:

https://github.com/rhinstaller/lorax/pull/216

Example kickstart is missing package grub2-efi-ia32 . System is unable to boot without it. Tested with no-virt option both make-disk with rhel7-minimal.ks and make-iso with rhel7-livemedia.ks .
Adding mentioned package manually makes both .iso and .img bootable.
Legacy grub2-efi in %packages is provided by grub2-efi-x64 , but not with grub2-efi-ia32 , which is not installed.
I have tested both output from make-iso and make-disk .img on both x64(KVM VM) and ia32(Minnowboard Turbot) firmwares. With added package grub2-efi-ia32 it works fine.
Patch in attachment.

Created attachment 1292006 [details]
patch_to_add_package

Verified on RHEL-7.5-20180201.2 with lorax-19.6.104-1 .

Lorax now contains rhel7-livemedia/minimal.ks with correct packageset
Live .iso is able to boot without problem on 32bit UEFI firmware. All needed packages are installed.

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://access.redhat.com/errata/RHBA-2018:0947