Grub2

Every time a new kernel arrives via dnf upgrade, your Fedora EFI boot entry disappears. You reboot and the UEFI firmware can’t find Fedora anymore. You have to manually regenerate GRUB and recreate the boot entry. Again. This is a Fedora issue with duplicate or malformed boot entries in the UEFI firmware. The kernel update process has hooks that regenerate GRUB, but if you have bad entries sitting there, the system gets confused and deletes the good one instead of refreshing it. ...

G4 desktop, Fedora 44 on SDA. Decided to try RakuOS on a spare NVMe. Booted the G4 again and Fedora wouldn’t boot from SDA. The EFI entry exists. The files are there. But the UEFI firmware just skips SDA and boots something else. understanding the problem Your computer’s EFI system (UEFI firmware) has a boot order list. That list points to files on disk that tell the firmware how to boot each OS. If that pointer gets broken or the bootloader itself isn’t properly initialized, the entry becomes dead weight. It exists but doesn’t work. ...