Am 29.03.24 um 11:55 schrieb Alexander Puchmayr:
Hi,
After upgrading two Lenovo Laptops (UEFI, secure boot disabled), grub does not
work anymore; instead it says "Welcome to Grub" ... And then immediately boots
into bios setup.
What did go wrong?
I did the usual things:
* emerge update world
* emerge --config gentoo-kernel
* grub-mkconfig -o /boot/grub/grub.cfg
Everything went fine without errors, but then the final reboot, only bios setup.
And these steps do not alter the efi boot loaders
Any ideas? How to get out of this?
Alex
Hi,
die you follow the announcement about grub? eselect news read
2024-02-01-grub-upgrades
Title GRUB upgrades
Author Mike Gilbert <flop...@gentoo.org>
Posted 2024-02-01
Revision 2
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-efi/*.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 provided 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
