Re: [gentoo-dev] [PATCH] 2024-02-01-grub-upgrades: add news item

[Sam James <sam@gentoo.org>]

Mike Gilbert <floppym@gentoo.org> writes:

> Signed-off-by: Mike Gilbert <floppym@gentoo.org>
> ---
>  .../2024-02-01-grub-upgrades.en.txt           | 40 +++++++++++++++++++
>  1 file changed, 40 insertions(+)
>  create mode 100644 2024-02-01-grub-upgrades/2024-02-01-grub-upgrades.en.txt
>

LGTM.

> diff --git a/2024-02-01-grub-upgrades/2024-02-01-grub-upgrades.en.txt b/2024-02-01-grub-upgrades/2024-02-01-grub-upgrades.en.txt
> new file mode 100644
> index 0000000..f7aaa72
> --- /dev/null
> +++ b/2024-02-01-grub-upgrades/2024-02-01-grub-upgrades.en.txt
> @@ -0,0 +1,40 @@
> +Title: GRUB upgrades
> +Author: Mike Gilbert <floppym@gentoo.org>
> +Posted: 2024-02-01
> +Revision: 1
> +News-Item-Format: 2.0
> +Display-If-Installed: sys-boot/grub
> +
> +When booting with GRUB, it is important that the core image and modules
> +have matching versions. Usually, running grub-install is sufficient to
> +ensure this.
> +
> +On the UEFI platform, grub-install allows the core image to be placed in
> +two different locations:
> +
> +EFI/gentoo/grubx64.efi
> +This is the location used by grub-install without options.
> +
> +EFI/BOOT/BOOTX64.EFI
> +This is the location used by grub-install --removable.
> +
> +On upgrades, it is common for users to mismatch the grub-install options
> +they used for the current and previous versions of grub. This will cause
> +a stale core image to exist. For example:
> +
> +/boot/efi/EFI/BOOT/BOOTX64.EFI (grub 2.06 core image)
> +/boot/efi/EFI/gentoo/grubx64.efi (grub 2.12 core image)
> +/boot/grub/x86_64-pc/*.mod (grub 2.12 modules)
> +
> +Booting this system using BOOTX64.EFI image would likely fail due to a
> +symbol mismatch between the core image and modules. [1]
> +
> +Re-runing grub-install both with and without the --removable option
> +should ensure a working GRUB installation.
> +
> +However, this will clobber any BOOTX64.EFI image provded by other
> +loaders. If dual-booting using another boot loader, users must take care
> +not to replace BOOTX64.EFI if it is not provided by GRUB.
> +
> +References:
> +[1] https://bugs.gentoo.org/920708