On 18/09/2025 05:09, Richmond wrote:
sudo grub-install --target=x86_64-efi --efi-directory=/boot/efi
--bootloader-id=debian12
[...]
/boot/efi/EFI# ls -l
total 20
drwx------ 2 root root 4096 Oct 31 2014 Boot
drwx------ 2 root root 4096 Dec 28 2023 debian
drwx------ 2 root root 4096 Sep 17 17:13 debian12
In the case of enabled Secure Boot it does not work for grub 2.06-13 in
Debian 12 bookworm. You have the following options:
- Let grub from trixie boot bookworm or vice versa by enabling os-prober.
- Install grub 2.12 from bookworm-backports.
- Change EFI/debian to e.g. EFI/debian13 for trixie (by changing
GRUB_DISTRIBUTOR)
- Move EFI/debian for bookworm or for trixie to the EFI partition with
SUSE and use EFI/debian for both.
UEFI boot menu may still be confusing without additional tuning.
I hope, UEFI implementation ignores the "removable" EFI/Boot directory.
