Dual Boot Linux (Ubuntu 22.04) and Windows 11 on Modern Systems – UEFI

In order to setup a dual boot of Windows 11 and Ubuntu 22.04 on a modern system that uses UEFI, follow these steps.

1. Install Windows 11 first leaving some unpartitioned space (at least 60GB is my recommendation) on the drive you're installing Windows on.
2. Boot up the Ubuntu installer.
3. During installation, you'll be presented with an Installation Type options screen.  Choose "Something else". 

4. On the next screen, you'll see a list of drives and partitions.  On the same drive you installed Windows, create 3 new partitions. 
   1. Create an EXT4 partition for the / mount point at least 40GB in size (this is the main drive for Linux files).
   2. Create a SWAP partition at least 18GB in size.
   3. Create an EFI partition at least 500MB in size.  This is extremely important in order to get grub to install properly. 
5. Leave the "Device for boot loader installation" set as the top level drive that Windows and Ubuntu was / is being installed on.  You should not select an individual partition here.

6. Complete the installation process. 
7. You might need to change the UEFI boot order in the BIOS of your system to boot Ubuntu / Linux first versus booting the Windows EFI partition.  Since you created an EFI partition for your Linux install, it should show up as a bootable option in the bios.  Set / adjust accordingly.
8. That's it!

Tags: 11, 22.04, boot, dual, efi, else, grub, install, installation, linux, loader, partition, something, ubuntu, uefi, windows

This entry was posted on Thursday, December 7th, 2023 at 11:25 am and is filed under Guides, Linux, Rocky Linux, Ubuntu Linux, Windows. You can follow any responses to this entry through the RSS 2.0 feed. You can skip to the end and leave a response. Pinging is currently not allowed.