A minor problem that has plagued me for some time, I would be done for the day, leave the home office, and yet hours later all 4 screens were still left on. I hate paying for the power to leave my screens on all night plus the fact it reduces the screens longevity. Most importantly, its a security issue. I want my computer to lock when I am not at it. Many times I press Win+L to lock but sometimes I forget.
I generally leave my security cams up on the top screen, and I was fairly sure Chrome has a way of telling Windows to not go to sleep because media was playing. Well, I was right.
Detecting the Issue
Simply run this command to see what is holding up the system:
Notice there under DISPLAY: that Chrome is playing video?
The block Chrome from preventing the computer from sleeping simply run this command (change it from chrome to another app name if its not chrome):
powercfg -requestsoverride PROCESS chrome.exe awaymode display system