Most linux distros will fail to boot the installer (crash to black screen) due to a failure to load the display driver for Intel/NVidia Hybrid in Optimus (MUX) mode
Known to fail: ❌ Elementary OS 7 ❌ nixOS (both Minimal & Gnome) ❌ Ubuntu 23
Succeeds: Ubuntu 22
Ubuntu 22 will install but will not show 240hz mode, so you will need to:
sudo apt install nvidia-prime
sudo ubuntu-drivers install
If you have a failure to install due to a conflict in Ubuntu drivers & Nvidia drivers, run
sudo dpkg --force-all -P nvidia-firmware-535-server-535.54.03 nvidia-kernel-common-535 nvidia-compute-utils-535
(use tab-completion for your exact firmware version)
sudo apt --fix-broken install
Then go into BIOS (repeat F2 while restarting) and then disable Display > Hybrid Graphics.
240hz mode will work on boot.
Until kernel 6.0 (Ubuntu 23+) it won't be possible. There is no known way to get Linux Kernel 6 on Alienware M16, please let me know if you know how @jonathanleaders on twitter.