Does GRUB work on UEFI?

Kid_who_uses_debian · 02-18-2022, 10:19 AM

I hope it does.

hazel · 02-18-2022, 10:26 AM

Yes, it does, but you have to tell it when you install it that you want a UEFI install. In that case, it won't try to put the first stage in the mbr. It will just put the second stage in EFI format onto your EFI system partition. It will be called something like grubx64.efi. Then the UEFI chip is told to boot that. Usually you don't need to make any further adjustments.

Kid_who_uses_debian · 02-18-2022, 10:30 AM

Quote:

Originally Posted by hazel

Yes, it does, but you have to tell it when you install it that you want a UEFI install. In that case, it won't try to put the first stage in the mbr. It will just put the second stage in EFI format onto your EFI system partition. It will be called something like grubx64.efi. Then the UEFI chip is told to boot that. Usually you don't need to make any further adjustments.

I'm planning to install Fedora when i got my 2nd SSD. Do i have to do anything?

teckk · 02-18-2022, 11:24 AM

To make Fedora boot? Of course. The bootloader will have to point to the init system, which loads the kerenl etc.
https://docs.fedoraproject.org/en-US/docs/
https://docs.fedoraproject.org/en-US...started-guide/

Edit:
Read the docs.
https://docs.fedoraproject.org/en-US...2_Boot_Loader/

AwesomeMachine · 02-18-2022, 05:11 PM

Fedora will automatically install to boot the way the system is set up to boot in the BIOS. The most likely settings to work, and take advantage of most UEFI features, are compatibility mode 'on', UEFI and legacy, UEFI first, secure boot 'off', operating system 'other'. However, when complying to PC standards, such as UEFI, Linux is by the book. If the system has a flaky UEFI implementation, you might need to try some special maneuvers that apply only to your specific hardware. But Fedora is cutting edge, so it should have all the latest stuff in it to boot with UEFI. UEFI booting capability is with Linux is the norm these days. I haven't worked with Fedora for years. But the team hasn't changed 'that' much. I'm sure you can do it. I have faith in you!

computersavvy · 02-18-2022, 06:00 PM

Quote:

Originally Posted by AwesomeMachine

Fedora will automatically install to boot the way the system is set up to boot in the BIOS. The most likely settings to work, and take advantage of most UEFI features, are compatibility mode 'on', UEFI and legacy, UEFI first, secure boot 'off', operating system 'other'.

Almost, but not quite. I use fedora regularly.

If installing from the fedora installation live media and using the bios boot menu there should be 2 items that can be selected for that media. (the fedora media is hybrid boot, meaning it can boot either legacy or uefi). You should select the item that reflects the mode you wish to use for booting and fedora will then install in that mode. If you select the item that is marked as uefi then it installs for efi boot and if you select the other then it will install mbr boot. For dual booting make sure you select the same mode as the other OS uses to avoid other problems.