Why does changing LCD screen resolution (Windows 7) take several seconds?

Posted by Jakub P. on Super User See other posts from Super User or by Jakub P.
Published on 2012-10-06T14:59:31Z Indexed on 2012/10/06 15:40 UTC
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Why does it take so long for a computer monitor to change resolution? Why does it take 2-3 seconds rather than, say, 50 ms?

E.g. my current Windows 7 with strong GPU and 24 inch monitor takes 2-3 seconds. Why so long? I know some might say "it's JUST 2 seconds", but come on... Games produce hundreds of FPS, and monitors work at 60 Hz, so what is it that takes so much time?

I remember this was the same in just about any machine I ever worked with.

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