I'm well aware of how to extend the desktop manually to my second display. But as we all know, it's tedious to go in to resolution setting each time. I tend to shut off my second display, either for full screen applications that can't handle it too well, or simply when I'm not using it.
What I'd like to have is for the desktop to automatically extend only when the second screen is turned on (but still plugged in). I'm not sure if the display signals the hardware if it's on or not, so this might not be possible in the first place.
Does a standard display notify the hardware that the display is turned on? Is there any software that utilizes this to allow you automatic switching of the desktop extension?