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Relation between Sx and Dx power states in Windows

Relation between Sx and Dx power states in Windows

I am wondering what the relationship is between the Sx power states and the Dx power states. E.g. when I set the display to sleep after 5 minutes and the system sleep time to 10 minutes, will the system enter the S1-S4 power states after 5 minutes or only after 10 minutes? Also, if the system sleep time is set to 5 minutes and the display sleep time to 10 minutes, will the system go to sleep after 5 or after 10 minutes? I am asking because I am writing software that will communicate with the display over DDC. If the display is sleeping (D3 mode I presume), and the system stays at S0, then communication will not be possible. I would like to catch the power events, and take appropriate actions.

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