Dual-monitor configuration

Just couple of xrandr commands (after struggling with KScreen-like GUI tools without results).

1. Choose big screen:

xrandr --output VGA-0 --mode 1920x1080 --output LVDS --off

2. Use both screens (notebook is to the left of its big brother):

xrandr --output VGA-0 --mode 1920x1080 --left-of LVDS --primary --output LVDS --mode 1366x768

Notes:
- Notebook's screen is LVDS and big monitor is VGA-0; you may check your outputs by calling "xrandr" without parameters
- Resolutions are 1920x1080 and 1366x768 respectively