Hi there,  Many thanks for your time. It's my stupidity but I still want to show because may some other users face the same problem like me.  I tried a lot approaches: hard reset, including reset my laptop as well, etc. However, I did not notice that the auto Monitor turn off & sleep setting do not apply with slideshow in lockscreen (I accidentally turn from Windows spotlight to Slideshow). Rationally, when I came to Power & sleep settings, I totally focused on the below options and did not notice the warning from Windows for the lockscreen slideshow.  So, my problem is solved now. Really sorry for your time and thanks very much for your effort.  Regards,  [IMAGE]
Hi, Like many others, I've been extremely frustrated with my Alienware M15 R5 (ST:  ). The system can no longer go into sleep mode, doesn't automatic turn off monitor after the set time and even doesn't Hibernate (I activate the Hibernate option in the power config).  Whenever I try to manually put the laptop to sleep, it may turn off the monitor for a few seconds. The keyboard and alien heads lights still turns on, then it IMMEDIATE wakes up!  I've updated all that I can, BIOS, Windows, NVidia. I googled all that I can. I tried all of the powercfg command. But it still doesn't WORK. I have seen numerous people, topics online and they have had the same issue.  Please help me with this issue. Thank you. 
m15 R5, no sleep, doesn't turn monitor off, no hibernate