Whenever I drop down my laptop screen it does not go to the sleep mode nor hibernation. I went to the "more power options" and then select "choose when to turn off the display" and there I choose sleep for plugged in and hibernate for unplugged. I also tried cmd prompt as administration and use the command "powercfg -HIBERNATE ON" But it still does not work. I've a INTEL ENERGY MANAGEMENT DRIVER installed in my laptop(Lenovo G580 model 20157 with Win7 Ultimate). Any suggestions ?