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  • Re: UEFI multiboot (was: Re: Default partition mounts [ "Installation G

    From Erwan David@21:1/5 to Max Nikulin on Tue Aug 20 17:30:01 2024
    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

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  • From Nicolas George@21:1/5 to All on Tue Aug 20 18:00:01 2024
    Max Nikulin (12024-08-20):
    Single EFI System Partition may contain loaders from different vendors, but not 2 Debian systems installed on different partitions.

    This is not true. The only problem you will have with this setup is that
    you will need to install and/or configure the bootloader manually.

    EFI files are signed
    for Secure Boot, so vendor paths can not be easily adjusted.

    Secure boot is a joke when it comes to security, its only “merit” is to prevent lusers from installing software with disabled DRM.

    I have no idea
    how much trouble may cause multiple ESP on the same drive.

    Once the bootloader is installed, the partition is referred by UUID, it
    does not matter if it is the ESP or not.

    --
    Nicolas George

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