Re: Boot order use the oldest kernel

[sixpack13]

@Tim thanks for clarification !

@Jon

set in /etc/default/grub 
GRUB_DEFAULT=0

and  run 

[ -d /sys/firmware/efi/efivars ] && sudo grub2-mkconfig -o
/boot/efi/EFI/fedora/grub.cfg || sudo grub2-mkconfig -o /boot/grub2/grub.cfg