Re: grub-mkrescue vs grub-mkstandalone.

[Andrei Borzenkov]

On 08.07.2023 02:04, Hongyi Zhao wrote:
> Hi here,
>
> I have some puzzles on the difference between grub-mkrescue and
> grub-mkstandalone, more specifically, I would like to know the
> following things:
>
> 1. Currently, I'm using the following command to make a standalone EFI
> bootloader:
>
> $ grub-mkstandalone -O x86_64-efi -o grubx64.efi --modules='lvm fat
> ntfs part_msdos part_gpt ext2 btrfs probe regexp search configfile'
> boot/grub/grub.cfg=./boot/grub/grub.cfg
>
> Can I use the grub-mkrescue to achieve the same goal?

no

> 2. In the above command, if I use all available modules as the value
> of --modules, as shown below:
>
> $ grub-mkstandalone -O x86_64-efi -o grubx64.efi --modules='time
,,,
> hfsplus video configfile setjmp tga disk'
> boot/grub/grub.cfg=./boot/grub/grub.cfg
>
>
> But the EFI file generated this way will freeze when I try to load it.
> Any more hints for this problem?

--modules are initialized when binary is started by firmware. Some 
modules may conflict, in particular nativedisk is most certainly 
incompatible with EFI (I still wonder why it is built for EFI at all). 
Others may cause some side effects accessing hardware in unexpected way.

> 3. Can I achieve the same goal with grub-mkrescue to create an EFI
> file as done by grub-mkstandalone?

How is it different from 1?