Ubuntu installer and UEFI

[Liam Proven]

On Mon, 27 Jan 2020 at 18:36, Colin Law <clanlaw at gmail.com> wrote:
>
> For those who are only watching this from the sidelines and hoping to
> learn a little, how does one do that?

Depends on the machine, so I can't say.

On my Dell Precision 5810:

0. insert prepared USB live medium
1. During POST press F12 for the boot menu
2. When the menu appears there should be multiple sections. The USB
medium should appear twice, both under "Legacy" boot items and under
UEFI boot items

Both of these will boot the PC and allow you to access drives, mount
them, run `grub-install` etc.

However, as I discovered last week, the UEFI system variables are only
available if the option under UEFI boot options is picked. I need this
to reinstall GRUB as in Legacy mode, I cannot bind-mount the /proc,
/sys, /dev and other folders. I don't know why.

My Core i5 Thinkpads also have UEFI, but it is permanently locked in
BIOS emulation and so no UEFI features appear.

My Macs require different procedures and won't boot in Legacy BIOS mode at all.

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