I am using a laptop plugged into a docking station that connects to an external monitor. When I pull up the AMD software (Adrenalin Edition) settings, the option to turn off vari-bright only appears in the display settings that apply to the laptop screen; when I toggle to "display 2" for the external monitor, the vari-bright option disappears. As a result, when I watch movies the brightness is constantly changing. How do I fix this?