[ FIX ] Blank screen fix after Nvidia update.

xorg.conf

# ::: NVIDIA INSTALL :::
#
# Nvidia driver installation: https://linuxconfig.org/how-to-install-the-nvidia-drivers-on-ubuntu-18-04-bionic-beaver-linux.
# Method of "Manual Install using the Official Nvidia.com driver".
#
# ::: DISPLAY FIX :::
# 
# 0. append the following to /usr/share/sddm/scripts/Xsetup:
# ---------
#   xrandr --setprovideroutputsource modesetting NVIDIA-0
#   xrandr --auto
# ---------
#
# 1. update this file in /etc/X11/xorg.conf
# 2. sudo dpkg-reconfigure sddm  # probably unnecessary
# 3. sudo service sddm restart   # necessary
#
# :::

Section "ServerLayout"
    Identifier "layout"
    Screen 0 "nvidia"
    Inactive "intel"
EndSection

Section "Device"
    Identifier "intel"
    Driver "modesetting"
    BusID "PCI:0@0:2:0"
    Option "AccelMethod" "None"
EndSection

Section "Screen"
    Identifier "intel"
    Device "intel"
#    Option "UseDisplayDevice" "DFP"
EndSection

Section "Device"
    Identifier "nvidia"
    Driver "nvidia"
    BusID "PCI:4@0:0:0"
    Option "ConstrainCursor" "off"
EndSection

Section "Screen"
    Identifier "nvidia"
    Device "nvidia"
    Option "AllowEmptyInitialConfiguration" "on"
    Option "IgnoreDisplayDevices" "CRT"
EndSection