I reached out to the Alienware Team. Dell Alienware do not support Linux on the 2019 m15/m17/Area-51m. Note, we never offered Linux support on the previous 26 Alienware Laptops. Going forward, all further Linux discussion should be placed on the Linux General Forum board.  
Since I spend most of the time on Linux if I am not gaming, I really want to install Linux (Ubuntu etc.) in my Alienware m15. I tried Ubuntu 18.04, Ubuntu 16.04, Ubuntu 14.04 and CentOS 7 but all of them failed. I got a bunch of ACPI Errors during booting and then the machine freeze (unable to boot into the system). Although I can ignore them by setting 'acpi=off' and boot into the system, the machine will then freeze at shutting down/rebooting. I succeeded in installing Linux on other machines having two GPUs (Intel and Nvidia) so I assume the issue is that the current Alienware-m15 BIOS (version 1.2.5) is optimized for Windows 10 but not compatible with Linux. Please let me know if I am correct. And I would like to know. Would the next Alienware-m15 BIOS update be compatible with Linux?   Thanks   (Attached: ACPI Errors on screen when booting into Ubuntu 18.04) ACPI Error: [_GTP] Namespace lookup failure, AE_ALREADY_EXISTS (20170031/dswload-378) ACPI Expection: AE_ALREADY_EXISTS, During name lookup/catalog (20170831/psobject-252) ACPI Expection: AE_ALREADY_EXISTS, (SSDT: SataTab1) while loading table (20170831/tbxfload-228) ACPI Error: 1 table load failures, 13 successful (20170831/tbxfload-246)
m15, BIOS update for Linux compatibility?