Am 06.10.20 um 01:50 schrieb Chris Murphy:
In this case you can replace it by just copying a substitute
grubx64.efi to the proper location on the USB stick... which might be
EFI/BOOT, I'd have to poke it with a stick to find out.
I already tried to replace it with a f31 one, it did not help at all.
The difference must be something else: a block signature, blockloader,
mbr whatever is used on an efi bios with secure boot disabled before
that file is loaded.
I did not try to boot it with secure boot enabled, maybe i should test that.
Best regards,
Marius