Really appreciate your interest in this matter PGrey but sadly feel we’re flogging a dead horse here, don’t know but something tells me until a complete refresh/install is performed I won’t know one way or the other... Hey, can I ship the computer to you haahaha

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Anyhow... Manually invoking screen saver, sleep, hibernate all work just fine, stays as set and wakes up no problem, just does not go into “a” state automatically nor the next state in succession if available, never. As mentioned before as well, can set power button to turn off screen but comes back on instantly and never stays off. Tried several different/new power schemes, added a new user (admin) and tired power settings, looked at event viewer (no notable references), and active schemes are correct according to what is being displayed using powercfg, even registry shows everything is as it should be.
Yep driving me nuts too and as of late Windows hasn’t been my bestest friend, have my work PC as well that had the Windows App store along with several apps become completely none functional after AU, just as with the problem here nothing has resolved it, not cumulative updates, rollback to previous Windows version, restore, WSReset and so on, that’s another story though.
All I know is since owning this PC it has never given me an ounce of problems with the power settings, for that matter, since 1988 don’t recall having much problems in that department with any computer I’ve owned. Not sure if something went amiss with my hardware or it is truly an AU thingy but find it awful coincidental it became apparent after the update.
After dealing with many different platforms since W10 became “it”, (Android/iOS/Mac OS/Linux) it sure feels as if Windows is going in reverse, pretty much zero issues with the others in nearly 14 months and beyond yet 10 keeps being a thorn in my side, every update has me holding my breath. On a somewhat more positive note, I ran several beta versions of 10 via multiple PCs starting in Oct 2014, worked without many issues (obviously lacked many features), was happy at that time anticipating great things... Then the bugs started creeping in upon the consumer release come July 2015 with that trend continuing today, at least IMO.