On 27.11.2023 23:06, Pascal Hambourg wrote:
Hello,Distribution: Debian 12 (bookworm) GRUB version: 2.06 If I build an EFI GRUB core image with grub-mkimage --prefix='(hd0,gpt4)/' --format=x86_64-efi \ --output=/boot/efi/EFI/azerty/core.efi part_gpt ext2 when booting it, $prefix has the expected value: cmdpath=(hd0,gpt1)/EFI/azerty prefix=(hd0,gpt4)/ But if I build an EFI GRUB core image with grub-mkimage --prefix='(hd0,gpt4)' --format=x86_64-efi \ --output=/boot/efi/EFI/azerty/core.efi part_gpt ext2 (no / at the end of prefix), then when booting it, the $prefix value seems to be the combination of the --prefix device and the $cmdpath path: cmdpath=(hd0,gpt1)/EFI/azerty prefix=(hd0,gpt4)/EFI/azerty Is this expected behaviour ?
Yes. $prefix consists of two parts - device and the directory path. If one of them is missing during initialization, grub attempts to guess and fill it in.
