How transition happen from S3(Sleep Mode) to S4(Hibernation mode) in Power Plan policies ? I set the setting in power plan policies, here are the below steps Go to Control panel->Power options->Change Plan settings->Turn off the display: set to 1 Minute. Then click Change Advanced power settings-Sleep->& set Sleep after: 2 Minute and Hibernate after: 4 Minutes My expected result for mobile board is: 1.Display devices should turn off after 1 minute. 2.System should Enter into S3 state after 2 Minutes and S3 LED should lit. 3.After 4 Minutes system should switch to S4 from S3 & S4 LED on CRB should Lit. Am getting the result is: 1.Display devices should turn off after 1 minute. 2.System should Enter into S3 state after 2 Minutes and S3 LED should lit. 3.After 4 Minutes system switch to S4 from S3 and S0, S4 LED on CRB should Lit. Note: S3->S0->S4 is it rwirght or wrong, if its wright what process happen between S3->S0->S4. Can any help me to understand this transition