Setup custom screen resolution on Linux Mint 19.2 and save

cvt 1920 1080

Copy the modeline from "1920x1080 to +vsync

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

xrandr --addmode VGA-1 1920x1080_60.00



Save settings:

sudo nano ~/.profile

Paste above xrandr --newmode and xrandr --addmode full command lines at the bottom of the .profile file and save it.