Find modeline with:

gtf 1280 720 60


Add mode:

xrandr --newmode "1280x720_60.00"  74.48  1280 1336 1472 1664  720 721 724 746  -HSync +Vsync


Add mode to monitor:

xrandr --addmode eDP-1 "1280x720_60.00"



NOTE:  this seems to cause a problem.
Disable stretching:

xrandr --output eDP-1 --set "scaling mode" "Full aspect"




Switch to mode using monitor control panel


