Issue fixed. Bydefault 18.04 marked incorrect disk for the boot loader installation which caused the machine not boot properly. Due to this EFI mounts from secondary disk causing the booting issue.  Marked the correct disk during installation by choosing bootloader fixed the issue  Please mark this request as closed  Notes:-for dual boot in Aurora R9 For Ubuntu 18.04 / 16.04 below is the fix from my side From BIOS Disable secure boot, Storage AHCI mode Remove quiet and splash and add "nomodeset" from grub and install the OS. Mark correct disk from the bootloader list in the custom partitioning page On First boot,  quiet and splash and add "nomodeset" and install the NVIDIA proprietary drivers preferably latest one ( 440 ) . Then reboot, it will work
Hello Dell Support,  We are unable to proceed further with the installation of Ubuntu 18.04 on this dell alienware Aurora R9 model.  Issue:- Getting blank screen after the initial install grub prompt. Tried  acpi=off, nomodeset parameters added in grub still no luck Note:- Ubuntu 20.04 LTS worked without any issues.  Env:- ==== UEFI - Dual boot, secure boot disabled, SATA to AHCI Bios vers - 1.0.7 $find /sys/devices -name "edid" /sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-HDMI-A-1/edid /sys/devices/pci0000:00/0000:00:02.0/drm/card0/card0-DP-1/edid $lspci | grep VGA 01:00.0 VGA compatible controller: NVIDIA Corporation TU104 [GeForce RTX 2080 SUPER] (rev a1) 02:00.0 VGA compatible controller: NVIDIA Corporation TU104 [GeForce RTX 2080 SUPER] (rev a1) === Surprisingly this model has only one slot ( HDMI ). I checked in the service manual  "[URL]" it's mentioned over there it contains multiple Display ports. I'm not sure why this model contains only one slot(HDMI) As per Dell documentation -> [URL] to pass nomodeset to skip these issues. In our case that's also not working.  nomodeset:- defined to  instructs the kernel to not load video drivers and use BIOS modes instead until X is loaded. Please shed some views, how can I skip from the blank screen to proceed the installation process? Thanks Jaya
Dell Alienware Aurora R9 compatability issue with Ubuntu 18.04 , Dual boot.