Re: [PATCH docs] bootloaders: add secure boot shim example

[Stoiko Ivanov <s.ivanov@proxmox.com>]

Thanks for addressing this so quickly!

On Thu,  2 Jul 2026 10:57:41 +0200
Maximiliano Sandoval <m.sandoval@proxmox.com> wrote:

> On a system that was migrated from systemd-boot to grub2 with secure
> boot, the entry grubx64.efi would be missing and the systemd-bootx64.efi
> entry would be present. If the shimx64.efi entry is not mentioned, then
> the docs would incorrectly imply that the system uses systemd-boot as a
> bootloader.
> 
> We add the shimx64.efi entry to the docs to fill this gap.
> 
> Suggested-by: Stoiko Ivanov <s.ivanov@proxmox.com>
> Signed-off-by: Maximiliano Sandoval <m.sandoval@proxmox.com>
> ---
> 
> Notes:
>     On my machine:
>     
>     $ efibootmgr -v
>     Boot0000* Linux Boot Manager
>     HD(2,GPT,[..])/File(\EFI\systemd\systemd-bootx64.efi) [..]
>     [..]
>     Boot0002* proxmox
>     HD(2,GPT,[..])/File(\EFI\proxmox\shimx64.efi) [..]
> 
>  system-booting.adoc | 7 +++++++
>  1 file changed, 7 insertions(+)
> 
> diff --git a/system-booting.adoc b/system-booting.adoc
> index da87697..c3de158 100644
> --- a/system-booting.adoc
> +++ b/system-booting.adoc
> @@ -209,6 +209,13 @@ used in UEFI mode.
>  Boot0005* proxmox	[...] File(\EFI\proxmox\grubx64.efi)
>  ----
>  
> +If the output contains a line that looks similar to the following, GRUB is
> +used in UEFI mode with Secure Boot enabled.
I'd rather phrase that as:
If the active boot entry points to `\EFI\proxmox\shimx64.efi`, then secure
boot is enabled. 
(It's not set in stone that grub is the only boot-loader that can be
loaded from a signed shim - at some point in the future we might have
systemd-boot in that list as well, and prefer that for new installs)

alternatively we will need to rework the docs then anyways - so it's just
a suggestion - what do you think?

> +
> +----
> +Boot0005* proxmox	[...] File(\EFI\proxmox\shimx64.efi)
> +----
> +
>  If the output contains a line similar to the following, `systemd-boot` is used.
>  
>  ----