Hi Earl,

On Fedora 24 it's the same configuration as Fedora 23, you have to edit /etc/default/grub file and after run the grub2-mkconfig command to update the grub.cfg Configuration file in /boot. Make sure that the symbolic link of /etc/sysconfig/grub is still pointing to /etc/default/grub file.

Cheers, Edouard.

2016-07-07 14:51 GMT+02:00 Tom Horsley <horsley1953@gmail.com>:
On Thu, 07 Jul 2016 10:45:30 +0800
Earl Ramirez wrote:

> run grub2-mkconfig

As near as I can tell, absolutely nothing ever runs
the grub2-mkconfig program, so unless you run it yourself
you can make permanent changes by simply editing the
grub.cfg file directly.

When dnf installs a new kernel, it simply looks at
the existing kernel lines in grub.cfg and copies the
same options to the new kernel line (or the "grubby"
program it runs does that).



--
________________________________________
Edouard Fazenda
Tel : 0688451444