[ipxe-devel] Generating a BIOS/UEFI hybrid ISO image

Michael Brown mcb30 at ipxe.org
Tue Oct 5 20:24:41 UTC 2021

On 05/10/2021 15:18, Dean Westhead wrote:
> Yes ... that is what i have been trying .... and failing ! hehe !
> it all "makes" without any errors and after installing the xorriso package the genfsimg runs without any errors too.
> The only problem is that the outputted combined.iso will not boot a Dell UEFI laptop and RUFUS only sees the ISO as BIOS only too.
> If I copy over to the src/util directory the old geniso file and add the rule into into the Makefile.pcbios to use it, the resultant
> ISO file works fine on both BIOS and UEFI machines.
> The ISO file is also about 1Mb smaller when created with the genfsimg than with the geniso file .... almost like it is failing to add the
> bin-x86_64-efi/ipxe.efi file.

Did you try comparing the contents of the .iso images generated through 
both methods, including the contents of the embedded UEFI boot image 
(the ESP)?


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