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How does the operating system know the Monitor's or the TV's resolution

Last response: in Graphics & Displays
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December 11, 2013 12:12:39 PM

I use windows 7, when i right-click on the desktop and choose screen resolution, a window appears which tells me my current resolution + all available resolutions. I want to know how the OS knows the maximum resolution of the monitor, projector or HDTV that is connected to the graphics card....anyone ?

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a b x TV
a c 253 $ Windows 7
a b C Monitor
December 11, 2013 12:39:01 PM
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a b $ Windows 7
a c 102 C Monitor
December 11, 2013 12:40:01 PM

Any display will send displayID or EDID with all the info.
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a b x TV
a b $ Windows 7
a c 195 C Monitor
December 11, 2013 1:38:35 PM

It's called "voodoo".
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