Re: UEFI multiboot (was: Re: Default partition mounts [ "Installation Guide" lacks index ])

[Erwan David <erwan@rail.eu.org>]

On Tue, Aug 20, 2024 at 05:17:43PM CEST, Max Nikulin <manikulin@gmail.com> said:
> On 20/08/2024 11:27, David Christensen wrote:
> > AIUI UEFI/GPT were designed to support multi-boot
> 
> Single EFI System Partition may contain loaders from different vendors, but
> not 2 Debian systems installed on different partitions. EFI files are signed
> for Secure Boot, so vendor paths can not be easily adjusted. I have no idea
> how much trouble may cause multiple ESP on the same drive. I tried ESP on
> different drives and it works (HP firmware on a decade-old laptop is quite
> buggy in respect to boot configuration). Actually GRUB menu to load system
> from alternative partition is more convenient than firmware boot menu in my
> case.

Here is the tree on my laptop, I think the "ubuntu part" comes from a
former Mint installation (Debian is tthe only OS on the computer)

.
└── EFI
    ├── BOOT
    │   ├── BOOTX64.EFI
    │   ├── fbx64.efi
    │   └── mmx64.efi
    ├── debian
    │   ├── BOOTX64.CSV
    │   ├── fbx64.efi
    │   ├── fw
    │   │   └── fwupd-cdcae5ae-413a-4198-b866-8028e994dd53.cap
    │   ├── fwupdx64.efi
    │   ├── grub.cfg
    │   ├── grubx64.efi
    │   ├── mmx64.efi
    │   └── shimx64.efi
    ├── Dell
    │   └── Bios
    │       └── Recovery
    │           ├── BIOS_CUR.RCV
    │           └── BIOS_PRE.rcv
    └── ubuntu
        ├── BOOTX64.CSV
        ├── fw
        ├── fwupdx64.efi
        ├── grub.cfg
        ├── grubx64.efi
        ├── mmx64.efi
        └── shimx64.efi


-- 
Erwan David