It is said that the --no-nvram option tells the grub-installer not to modify the motherboard’s NVRAM.
What will make it more secure to do the grub-install if the option is added.
Usually this is used for installs on mobile media to not add a boot entry for these devices to the motherboard NVRAM but on “re”-installing the grub-files into the system we do not need to rewrite the entry on the NVRAM.
NVRAM can get full or any non-working write to it can cause inconsistency…
(will this thread get the same as what-are-you-listening-to-right-now ? )