On Tue, Dec 11, 2018, 10:11 PM Samuel Sieb <samuel@sieb.net> wrote:

I also wonder if it's necessary to refresh grub's boot files. Does
anyone else know if grub upgrades update the boot sectors?

BIOS, no update happens, run grub2-install.

UEFI, it's updated. Don't run grub2-install.

(Silverblue, bootloader isn't updated, either firmware type.)

Chris Murphy