Mike Gilbert <flop...@gentoo.org> writes:
> Signed-off-by: Mike Gilbert <flop...@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 <flop...@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
