Most, if not all, Windows laptop computers will dim their screens after a configurable time duration. After an additional time duration, the screen will turn off completely. These settings are configured via the Power Options or Power Management control panel in Windows. Some computers even let you configure the percentage to dim at each stage.
What about external monitors connected via HDMI? Can they be dimmed automatically by Windows after a certain amount of time has passed?
What I've seen on laptops with external monitors is that the laptop screen will dim, but the external monitor will either be on on off. Is there a way to dim the external monitor at the same time the laptop's screen is dimmed?
To clarify, I'm not talking about the dimming of the display by using the screen's brightness controls. I'm talking about dimming during the power management sequence during periods of inactivity.
BTW, some external monitors shows how much power they are using. Reducing the brightness can reduce the power consumption by as much as 85%!