Setting Windows as the default option to auto boot in Grub

I don't know if this was already discussed over here (I can't seem to find any), but I want to auto boot into Windows whenever I start my PC, instead of booting in Bazzite, so how can this be done?

CtrlValCanc•2/14/25, 10:49 AM

You can try grub-customizer

sudo rpm-ostree install grub customizer

sudo rpm-ostree install grub customizer

Then you reboot and run it from terminal

grub-customizer

grub-customizer

CtrlValCanc•2/14/25, 10:52 AM

you choose Windows in "predefined"

HikariKnight•2/14/25, 10:54 AM

that is one good way to potentially break your system

HikariKnight•2/14/25, 10:55 AM

idk if grub-customizer (iirc its not even maintained anymore) even supports the customized grub that fedora atomic uses

SafOneOP•2/14/25, 11:00 AM

Damn so basically no proper way to do it

Reactive•2/14/25, 11:08 AM

not sure if this is what you're looking for, but if you're dual booting on two separate ssds you can just select the windows bootloader in bios

HikariKnight•2/14/25, 11:18 AM

havent tried it with fedora atomics grub but if you add

GRUB_DEFAULT="Windows Boot Manager"

GRUB_DEFAULT="Windows Boot Manager"

/etc/default/grub

/etc/default/grub

and then run

ujust regenerate-grub

ujust regenerate-grub

it should select the windows option by default, however as i said i have not tested it on the fedora atomic grub as i am 100% linux, no dual boot

HikariKnight•2/14/25, 11:18 AM

plus im at work and the other maintainers are asleep

wolfyreload•2/14/25, 12:59 PM

@SafOne Looks like you need to be more specific. Just

GRUB_DEFAULT="Windows Boot Manager"

GRUB_DEFAULT="Windows Boot Manager"

isn't working for me.

But this is working on my Rog Ally. I used this to determine what the menu entry was for Windows in grub

sudo cat menuentry /boot/grub2/grub.cfg | grep "Windows Boot Manager"

sudo cat menuentry /boot/grub2/grub.cfg | grep "Windows Boot Manager"

I got "menuentry 'Windows Boot Manager (on /dev/nvme0n1p1)' ......" as a result so I need to set 'Windows Boot Manager (on /dev/nvme0n1p1)' as the default boot item in /etc/default/grub

GRUB_DEFAULT="Windows Boot Manager (on /dev/nvme0n1p1)"

GRUB_DEFAULT="Windows Boot Manager (on /dev/nvme0n1p1)"

Then just

ujust regenerate-grub

ujust regenerate-grub

and you might need to run

ujust configure-grub show

ujust configure-grub show

too. And now I need to plug in a keyboard in my Ally to boot back into Bazzite, so I can change it back

Wwolfyreload @SafOne Looks like you need to be more specific. Just `GRUB_DEFAULT="Windows Bo...

SafOneOP•2/14/25, 2:11 PM

Lol, okay will try

wolfyreload•2/14/25, 2:19 PM

Btw are you Titan_1000 by any chance? I had a similar question around booting Windows by default on my youtube today. If so I don't have to figure out how to type this solution as a Youtube comment