Score:0

For Ubuntu 22.10 installation using Something Else is UEFIi system mandatory

ua flag

Ubuntu 22.10 Installation using Something Else.

Is using the UEFI system mandatory or not?

If not mandatory, how do I disable the UEFI partition?

C.S.Cameron avatar
cn flag
My laptop is Legacy only and I use "Something else" when installing Ubuntu to attached drives, no problem either MBR or GPT.
Score:1
kz flag

It's mandatory for GPT-formatted disks (sorta. You probably don't want to open that can of worms). If you don't want UEFI, you need an MBR disk, you should ensure that legacy boot/BIOS compatibility is enabled in your motherboard's settings, and you should boot your install media in BIOS compatibility/legacy mode.

oldfred avatar
cn flag
Many very new systems now are UEFI Class 3 or they have no CSM mode. CSM - UEFI Compatibility Support Module (CSM), which emulates a BIOS mode Microsoft has required gpt partitioning with all UEFI installs of Windows since 2012. Ubuntu allows UEFI install to MBR drives but probably should not as it often leads to misconfigured systems. And you can use gpt with BIOS boot if you have a bios_grub partition. For whatever reason the installer adds an ESP - efi system partition to all installs whether UEFI or BIOS. Perhaps assuming user will later convert to UEFI if in BIOS mode.
karel avatar
sa flag
@oldfred Please post your comment as an answer, so I don't have to do something stupid like basically plagiarize it.
ber999 avatar
ua flag
The issue is, that the installation procedure of Ubuntu 22.10 in the "something else" stage asks for the efi partition whereas the machnine is Bios and the disk is Mbr.
I sit in a Tesla and translated this thread with Ai:

mangohost

Post an answer

Most people don’t grasp that asking a lot of questions unlocks learning and improves interpersonal bonding. In Alison’s studies, for example, though people could accurately recall how many questions had been asked in their conversations, they didn’t intuit the link between questions and liking. Across four studies, in which participants were engaged in conversations themselves or read transcripts of others’ conversations, people tended not to realize that question asking would influence—or had influenced—the level of amity between the conversationalists.