Re: [arch-general] efibootmgr doesn't change boot order!

Some motherboards will boot the file '/boot/efi/EFI/Microsoft/Boot/bootmgfw.efi' if it is present, regardless of what is set elsewhere. This is an incredibly weird behavior but I've seen it (my MB is an example). My workaround is to rename this file to 'bootmgfw.efi.bkp' and configure GRUB to load that file when I opt to boot Windows natively. Since most, if not all Windows updates will restore that file, I also have bash and powershell scripts to revert it so that my workaround keeps working. On Mon, Dec 28, 2020 at 10:10 AM Maarten de Vries via arch-general < arch-general@archlinux.org> wrote:

Hey,

On 28-12-2020 12:12, Peter K Haokip wrote:

...

thanks for the reply, I am able to change the boot order from the BIOS menu. It works A-okay from there, I am trying to accomplish that with efibootmgr.

If you're unlucky, maybe the motherboard firmware prevents you from doing that. You could fall back to adding chain-load entries for grub in that case, to have grub start the next bootloader.

...

could you cite any link where I could read about it in details ? where the bootx64.efi file will be stored if I install it in NOT IN PORTABLE mode(?)? cuz that would help me know whether the grub is installed in portable or none portable mode.

You can add boot entries for any EFI executable on the EFI system partition, regardless of the name. These boot entries are stored on non-volatile storage on the motherboard. Normally, grub-install takes care of this, and the binary is installed as `efi/grub/grub.efi`. All you need to do is not pass `--removable` to grub-install.

You would install a bootloader as `efi/boot/bootx64.efi` only if you want to create a bootable USB stick, or if your motherboards UEFI implementation is so broken that that's the only thing that works.

...

Also, would be nice if you could provide any source where I can read about how I make my motherboard detect regular boot entries (instead of the /Efi/boot/bootx64.efi)

You can find everything in the specifications if you dig deep enough:

https://uefi.org/specifications

See in particular section 3.5.1.1 on "Removable Media Boot Behavior" of the "UEFI Specification Version 2.8":

https://uefi.org/sites/default/files/resources/UEFI%20Spec%202.8B%20May%2020...

Regards,

-- Maarten

...

thanks,

On Mon, 28 Dec 2020, 15:45 Maarten de Vries, mailto:maarten@de-vri.es> wrote:

On 28-12-2020 10:42, Peter K Haokip via arch-general wrote: > I read an forum entry from nearly 6 years ago about am efibootmgr bug that > Doesn't let you change the boot order on a multi OS system if you have arch > linux as the default OS. Had some users report this as well in other > forums. > Now i am facing the that problem in my system with arch ubuntu and windows. > > when i change the boot order , it shows the change 'temporarily' but when i > restart it boots the default (Arch linux Grub ) and the change disappears. > > I faced this issue last month and gave up on it since I couldn't find any > detailed resource on this on the net. > This list may be my last hope. > > If anybody could give some direction , would be much appreciated. > > regards, > khaithang39

Hey,

It could be a motherboard problem. Sadly I've seen more motherboards with weird bugs in their UEFI implementation than without. You could try to change the boot order through the motherboard firmware interface (often called "the BIOS" even if that isn't technically correct anymore) and see if that helps.

Another thing that may have happened is that you installed grub as portable bootloader. It will be called `efi/boot/bootx64.efi` on the EFI system partition if that happened. A bootloader under that name is auto-detected by the motherboard, even if you didn't add a boot entry for it manually. Perhaps your motherboard always favors such bootloaders over the normal boot entries.

If this is the case, you could install grub as non-portable bootloader by not passing `--removable` to `grub-install`, and then delete `efi/boot/bootx64.efi`. Alternatively, you might also be able to configure your motherboard to prefer regular boot entries before running `bootx64.efi` from that partition.

I hope this helps,

-- Maarten