Best posts made by Sebastian Perruolo

Thanks @zing, I'll try it.

I follow steps in Change display resolution on x86 x86_64

In my case I had to change .xinitrc in order to set:

##### Disable integrated video output
xrandr --output LVDS1 --off
##### Force VGA Display Output 1920x1080
xrandr --output VGA1 --mode 1920x1080