Ubuntu HEADLESS screen resolution for VNC / TeamViewer

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xrandr --newmode "1920x1080_60.00"  173.00  1920 2048 2248 2576  1080 1083 1088 1120 -hsync +vsync



xrandr --addmode VIRTUAL1 1920x1080_60.00



xrandr --output VIRTUAL1 --mode 1920x1080_60.00



xrandr --output LVDS1 --off

Source:  https://askubuntu.com/questions/679135/how-do-i-set-new-screen-resolution-for-a-headless-server-using-teamviewer-10