windows can and will break any multiboot it gets it's hands on, guaranteed just a matter of time
this post was submitted on 18 Jul 2024
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AFAIK you can just run os-prober in debian, and then you can launch endeavourOS from there.
Interesting… but that just replaces an existing step with another step. I’d like to reduce the overall steps to get to each system. And if I can’t do that, I’d at least like to switch the order to win>EOS>Deb
I'd have a look at the archwiki and install GRUB on eos, and in your bios set eos to be the first boot option, and that will give you the grub boot menu with the option to boot eos, debian or windows.
Damn, that would be perfect. I’ll give that a go. Thanks
Dual booting with Windows is always a pain, because Windows likes to nuke and replace your boot menu. The safest bet is keep Windows strictly separated: You create a 2nd efi system partition on your second drive with linux, use a boot loader there and then set everything up to start that as default. And then you configure the boot loader to chainload windows from it's own ESP on disk one. This way Windows is oblivious about linux systems it might try to damage. And you can then set the boot loader menu to a default or to default to the last system booted. (2 separate ESPs on on disk might work, but that is not supported by UEFI, so it depends on your hardware's implementation if they are recognized or if it just stops after having found the first...).
I would assume what you did was install the Linux boot loader (efi file) as the default like removable drives do (so grub's efi file installed as esp/EFI/BOOT/BOOT64.efi which is the default for removably drives to take priority; done via grub-install with the --removable flag, some installations might use this by default...)
People normally warn against dual booting because of the headaches it can cause - you went and fucked up with triple boot.
Are they installed on separate drives? Depending on the exact setup, Linux and windows both generally support legacy as a boot method, so you may be able to just BIOS to select a boot drive.
Yeah, two separate drives. Do you set up bios legacy from the bios menu?
Yes. May need to turn off secure boot too.
Try rEFInd. It's pretty good about detecting OSes and auto-populating its menu, and it has a pretty easy conf file format otherwise. Installing the refind debian package mayybe will also register it with the system firmware, I don't recall. If not, it can be set up with efibootmgr (which is not the most pleasant program, sadly).