KDE Neon Installation on Dell XPS 15 without erasing Windows 10

F2 to enter BIOS settings

- Disable Secure Boot

Boot to Windows 10

- msconfig->booting->safe boot check

Shutdown and Power On

Enter BIOS settings

- SATA Mode: RAID -> AHCI

Boot to Windows 10

- msconfig->booting->safe boot uncheck

Reboot to Windows 10

- Install Samsung NVMe driver

- Extract Windows 10 Partition around 200GB with disk utility

Shutdown

Insert KDE Neon (or Ubuntu) Installation USB stick

Turn on and Enter BIOS settings

- Boot Sequence: Add Boot Option with USB stick and uncheck other options

Boot with KDE Neon Live USB

- Run Install

- During partitioning,

  Create swap partition with the size of the memory.

  Create ext4 partition with mount position '/'

- Install OS

Here we can find an error message 'grub-efi-amd64-signed package failed to install'.

So, install rEFIind.

Download rEFInd - a binary zip file

Unzip the file.

Mount ESP with the root account.

- sudo su -

- mkdir /tmp/efi

- mount /dev/nvme0n1p1 /tmp/efi

Copy rEFInd file. (following http://www.rodsbooks.com/refind/installing.html#linux)

- cp -r ~/Download/refind /tmp/efi/EFI

- cd /tmp/efi/EFI/refind

- efibootmgr -c -l \\EFI\\refind\\refind_x64.efi -L rEFInd

Reboot

Enter BIOS settings

- Boot Sequence: Check refind and uncheck other options.

Reboot

Now we can boot with Windows 10 or Linux.