Ubuntu installer and UEFI

[Volker Wysk]

Am Montag, den 27.01.2020, 12:39 -0500 schrieb Little Girl:

> Just curious, but does the drive you're trying to do this on have 1
> MB of free space before the first partition?

Yes, it does.


> > How to tell the installer to make an UEFI system?

Boot the installation USB-stick in UEFI-mode There should be an entry
in the boot menu. Then the installer makes it UEFI. (See thread
"Installer makes broken GPT partition table").

> Below are the notes I created when I used UEFI for Ubuntu MATE 16.04
> LTS and they worked for me. I haven't installed 18.04 yet, but I plan
> to follow the same steps when I do. Note that I partitioned my drive
> before I did the Ubuntu MATE installation and instructions for that
> aren't in these notes because there are plenty of them all over the
> internet already. Please disregard any part of these notes below that
> you're already familiar with, but hopefully they'll contain something
> helpful:
> 
> ====================
> 
> When you install Ubuntu MATE with your new hardware, you'll want to
> pay attention to whether your BIOS (or whatever they refer to it as
> nowadays) is set up for UEFI or Legacy before you install since you
> need to partition your drive in a specific way for each one.
> 
> UEFI is modern and legacy is for backwards compatibility. Do some
> research on UEFI and see whether it's something you want or need. If
> you decide that it is, then some additional research would be in
> order to see how it's used. Some recommended reading that you'll want
> to supplement with additional research elsewhere:
> 
> https://help.ubuntu.com/community/UEFI
> 
> 
https://askubuntu.com/questions/647303/uefi-or-legacy-which-is-advised-and-why
> 
> https://askubuntu.com/questions/446968/legacy-vs-uefi-help 
> 
> If you can't partition your drive properly for UEFI, you may have to
> change the BIOS setting from UEFI to Legacy. You have two choices:
> 
> 	* You can enable UEFI in your BIOS (your motherboard handbook
> 	  will tell you how) and you will not have to make a BIOS
> 	  boot partition at all.
> 
> 	* You can disable UEFI in your BIOS (choosing Legacy instead)
> 	  and make a 1 MB BIOS boot partition, because GRUB requires
> 	  it on a GPT-partitioned hard drive. 
> 
> Important: If you get an "unable to satisfy all constraints on the
> partition" message, this is a Gparted bug that's been around since
> 2010. You must have at least 1 MB of free space before the first
> partition on the drive no matter which way you partition the drive.
> To solve the Gparted bug issue, you'll need to shrink one of your
> other partitions so that you have that free space on the drive.
> 
> Additional note: While inside the BIOS, instead of changing the boot
> order of your devices so that it will boot from USB first, you can
> leave the boot order as is and press F12 during boot to choose which
> device to boot from when you want to boot from USB.
> 
> Additional note: Dismounting USB is sometimes quirky in Ubuntu. If
> you put a USB stick in and boot from it to try out the Live CD and
> then decide to shut down and reboot from the USB stick so you can
> install the operating system (instead of clicking the Install button
> on the desktop), you must physically remove the USB stick when
> prompted as part of the shutdown (or remove it and plug it back in
> after shutting down) or it won't boot from it when you restart.
> 
> Additional note: If you get nothing but a purple screen on boot,
> press Ctrl + Alt + F2 to get to a prompt and type sudo apt-get
> install lightdm followed by sudo dpkg-reconfigure lightdm and reboot
> and you should have a reusable desktop.
> 
> ====================
> 

This coincides with what I've researched. 

But now I know how to make the installer make an UEFI system: Boot the
installation USB-stick in UEFI mode, and the installer will make a
valid UEFI installation automatically.

Cheers
Volker