Virtual Monitor
===

Step 0: Enable Screen sharing through connecting monitor first
Settings → Sharing → Screen Sharing → set ‘Active’

Step 1: update and install xserver-xorg-video-dummy

$ sudo apt update
$ sudo apt install xserver-xorg-video-dummy

Step 2: Create Config for Dummy virtual Display

$ cd /etc/X11
$ sudo vim xorg.conf.dummy

Step 3 :

Section "Device"
    Identifier "DummyDevice"
    Driver "dummy"
    VideoRam 256000
EndSection
 
Section "Screen"
    Identifier "DummyScreen"
    Device "DummyDevice"
    Monitor "DummyMonitor"
    DefaultDepth 24
    SubSection "Display"
        Depth 24
        Modes "1920x1080_60.0"
    EndSubSection
EndSection
 
Section "Monitor"
    Identifier "DummyMonitor"
    HorizSync 30-70
    VertRefresh 50-75
    ModeLine "1920x1080" 148.50 1920 2448 2492 2640 1080 1084 1089 1125 +Hsync +Vsync
EndSection

<b>Step 4: Update /etc/X11/xorg.conf</b>

$ cp xorg.conf xorg.conf.backup
$ cp xorg.conf.dummy xorg.conf

Step 5 :eye-in-speech-bubble:

sudo reboot