For my ISO, in lb config I am specifying the following:
--binary-image iso-hybrid --uefi-secure-boot auto
However the binary generated will not boot unless the EFI option is checked (ex: in VirtualBox and VMware player). So basically it is resulting in a UEFI only ISO.
I have installed grub-pc-bin and grub-efi in the host OS on which I am generating the ISO, however the issue persists.
What am I doing wrong please?