Ubuntu 18.04 Live-USB boot freezes on Dell Alienware m15 [SOLVED]

Observed behavior

While booting on a live-USB key  to install Ubuntu 18.04 on an Alienware m15 (with SSD NVME disks), the installer gets stuck. No graphical welcome screen.


Modify Grub options:

  1. When Grub shows options, select an entry (say « Install Ubuntu »), type e to edit.
  2. Replace quiet splash --- by acpi=off (old syntax noacpi does not work).

This worked for me, I had the installer working.