https://docs.fedoraproject.org/en-US/fedora/rawhide/system-administrators-guide/kernel-module-driver-configuration/Working_with_the_GRUB_2_Boot_Loader/ as accessed 10-26-20: In the section Customizing the GRUB 2 Configuration File, the note Important says "In order to display this list when booting, press and hold any alphanumeric key when the BIOS information is displayed; GRUB 2 will present you with the GRUB menu.". "[A]ny alphanumeric" is wrong; what works is "the Esc".
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