Re: UEFI multiboot control usurped with each kernel update

[Barry Jackson]

On 09/08/18 06:10, Felix Miata wrote:
> With 3 distro installations on one disk, each OS as a kernel update is installed
> updates NVRAM to make its entry in the ESP partition top priority. How can I
> stop that from happening, so that my choice of priority remains first instead of
> me needing to remember before shutdown or reboot to run efibootmgr to put it
> back like it was before the kernel update? I don't want to prevent the update
> from creating a new /boot/grub/grub.cfg, only from usurping boot priority.

In Mageia you can use drakboot (from MCC) and select to "not touch MBR 
or ESP" in an Advanced screen.
This adds switches ( --bootloader-id=tmp --no-nvram) to grub2-install in 
/boot/grub2/install.sh (which is used during kernel updates) to stop the 
nvram entries being upset.
It is a hack using a dummy entry, but it works.
How or if other distros implement this functionality I have no idea.