Creating a Virtual Display for VNC using XRandR

virtual_display.sh

# Create new modes
xrandr --newmode virtual_mode $(cvt 1920 1080 60 | grep -oP "\".*\" \K(.*)")
xrandr --newmode note10 $(cvt 2280 1080 60 | grep -oP "\".*\" \K(.*)")
xrandr --newmode note10_half $(cvt 1144 540 60 | grep -oP "\".*\" \K(.*)")
xrandr --newmode note10_half_flip $(cvt 540 1144 60 | grep -oP "\".*\" \K(.*)")
xrandr --newmode tablet $(cvt 1280 800 30 | grep -oP "\".*\" \K(.*)")
xrandr --newmode tablet_half $(cvt 640 400 30 | grep -oP "\".*\" \K(.*)")
xrandr --newmode tablet_quart $(cvt 960 600 30 | grep -oP "\".*\" \K(.*)")

export XMODE=tablet_quart
xrandr --addmode VIRTUAL1 $XMODE
xrandr --output VIRTUAL1 --mode $XMODE

# use `arandr` to visually adjust display positions, or
# (virtual screen coordinates)
#     0       1366                 1366+1920
#
#   0           A-----------------------
#               |                      |
#               |                      |
#               |                      |
#  x? B---------|         HDMI         |
#     |         |                      |
#     |  LVDS   |       1920x1080      |
#     |1366x768 |                      |
# 1080 ----------------------------------
# https://superuser.com/questions/485120/how-do-i-align-the-bottom-edges-of-two-monitors-with-xrandr
xrandr --output eDP1 --pos 0x600 --output VIRTUAL1 --pos 0x0

# adb for direct connections via USB
adb reverse tcp:5900 tcp:5900

# Start VNC server into the first screen from the left
x11vnc --localhost --clip xinerama0 --forever

Note 10 Performance:
91% Battery at 09:20 AM running at ~50% brightness
81% Battery at 11:20 AM ''