Score:0

Ubuntu

How to choose BIOS priority from within Ubuntu?

Roy Sada

4/26/24, 11:39 PM

My Gigabyte Aorus BIOS doesn't work because of my GPU. When I disconnect the GPU the BIOS works again.

I'm looking for an option in Ubuntu to choose the boot priorities of the BIOS.

For example, I want to be able to choose what boots first-- a USB stick, or my second SSD where Linux is installed.

137

3 + 2

boot

grub2

dual-boot

uefi

Will

4/27/24, 5:14 AM

I’m interested in understanding why you want to do this? Why not - from directly within the bios - set it up the way you want? It’s something that typically doesn’t need changing very often - why do you need to do it via Ubuntu? My computers are always set to boot from usb first - but as there’s no USB connected during boot, it goes to the ssd straightaway.

David

4/27/24, 7:55 AM

The BIOS Basic Input Output System is hardware that runs before ANY OS. This is not something you can change with in an OS.

Score:0

Ubuntu

Simon Richter

4/27/24, 5:14 AM

The efibootmgr tool allows you to set the BootOrder if you want to do this permanently, and the BootNext setting that overrides the BootOrder once.

You can also add and remove boot menu entries there. Any item you want to boot will still need to follow the Secure Boot policy configured in the BIOS.

+ 2

David

4/27/24, 7:57 AM

OP never said it was EFI he said it was BIOS.

Nicolas Formichella

4/27/24, 9:52 AM

@David The tag is [tag:uefi] so it is

Score:0

Ubuntu

m_krsic

4/27/24, 4:53 AM

Restart/power on the PC and hold the shift key right away to get the Ubuntu Grub bootloader, you should see a UEFI setting at the bottom of the list to go into the BIOS/UEFI menu.

+ 0

Score:0

Ubuntu

Nicolas Formichella

4/27/24, 5:11 AM

If it is UEFI, you can use efibootmgr :

From man 8 efibootmgr :

DESCRIPTION

efibootmgr is a userspace application used to [...] change the boot order

You can then use

[root@localhost ~]# efibootmgr

To list all entries, for ex :

BootCurrent: 0004
BootNext: 0003
BootOrder: 0004,0000,0001,0002,0003
Timeout: 30 seconds
Boot0000* Diskette Drive(device:0)
Boot0001* CD-ROM Drive(device:FF)
Boot0002* Hard Drive(Device:80)/HD(Part1,Sig00112233)
Boot0003* PXE Boot: MAC(00D0B7C15D91)
Boot0004* Linux

Then, lookup the entry you need and issue the bootloader change command, let's say you want PXE first and then Linux :

[root@localhost ~]# efibootmgr -o  3,4

+ 3

David

4/27/24, 7:57 AM

OP never said it was EFI he said it was BIOS.

Zanna

4/27/24, 9:59 AM

@David people (including me) are still calling it BIOS through habit. Unless the machine is really old, it will have UEFI.

David

4/27/24, 10:16 AM

I have 6 machines none of which have EFI guess they are all really old.

Elon Musk

I sit in a Tesla and translated this thread with Ai:

EN: How to choose BIOS priority from within Ubuntu?

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