#http://askubuntu.com/questions/379123/can-i-zoom-out-windows-or-scale-the-whole-desktop
xrandr --output LVDS1 --mode 1920x1080 --scale 2x2 --fb 3840x2160 --panning 3840x2160
# 3k
# xrandr --output LVDS1 --mode 1920x1080 --scale 1.5x1.5 --fb 2880x1620 --panning 2880x1620