fedora grub entries disappearing after kernel updates, here's why and how to fix it
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. ...