Jan <tona_kosmicznego_smie...@interia.pl> writes: > On Fri, 15 Nov 2019 15:49:23 +0100 > Marius Bakke <mba...@fastmail.com> wrote: > >> Did you get the same error when you mounted at /boot/efi? > Yes. > >> If you want the USB drive to be 'portable', i.e. not tied to a single >> system, you can not use 'grub-efi-bootloader'. The reason is that >> grub-efi relies on updating UEFI firmware variables *on the running >> system*, to make the newly installed bootloader show up in the UEFI >> boot menu. >> >> For the same reason, it is not possible to use it on a non-UEFI >> system. >> >> It would be good to have a 'grub-standalone-bootloader' procedure that >> would write a self-contained UEFI firmware executable to a standard >> location, similar to what Guix does for disk images: >> >> https://git.savannah.gnu.org/cgit/guix.git/tree/gnu/build/vm.scm?id=4dcf32b56b824efcdb181c9f4cc7ee6c8a0ba125#n399 >> >> Would you like to try implementing it? > > Well, I could try as a Scheme learning exercise, but it would take me > some time, because I'm a fresh Guile coder and the only thing I know > about UEFI is that it has a buggy implementation on my motherboard and > GRUB goes to hell :) > Any hint where could I start?
I would start by copying an existing bootloader from gnu/bootloader/grub.scm and make it run 'grub-mkstandalone' as in the above URL. Hope this helps! Marius
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