Not sure when, why, or how but every day to couple of days while having my PC on (it doesn't sleep), the screensaver suddenly stops coming on and instead the screen stays on and also never sleeps. I've been jokingly considering it some insomniac reflex but I digress. Rebooting the system restores functionality.
So far as I can tell I am not running anything that wouldn't be running when it does work. There's no videos or audio playing or even open somewhere. powercfg.exe /waketimers
says there's nothing.
I also have another system running Win10 where the screensaver just flat out never works. Never worked on Win8.1 and still doesn't after the upgrade.
I am using the photos screensaver on PC1 and ribbons on PC2. Both work when I test them manually.
How can I get to the bottom of this?