Screensaver is not working after Windows update to 1903.

I'm on a PC. Microsoft cannot continually offer updates that bork things that were working perfectly fine until their installation.

Nothing else was updated...only 1903 installed. Result = no screensaver.

Nvidia 1070 with latest drivers, which worked perfectly {as in didn't interfere with the activation of the screensaver} until your change.

Stop with the asinine offerings and platitudes. Its bloody obvious that hardware polling isn't being handled to differentiate between "I'm still here" and "look, I've moved" which results in the screen saver not triggering.

If Microsoft has got a better possibility then lets hear it?

I had the same problem too (screen saver worked until updating Win10 to Win10 1903).

For me, Step #4 (Check 'On resume, display logon screen') helped "kickstart" the screen saver to work again. I unchecked it after it worked and the screen saver is still working as intended.

Previously I temporarily changed screen savers and the wait period, but that didn't help. But maybe doing that in combination with checking 'On resume, display logon screen' will help others get their screen saver to work again.

This worked for me too.  Apparently since 1903 the screen saver only functions(for me) if the "On resume, Display Logon Screen" option is checked.  If I uncheck it, screen saver won't kick in.  It's getting really annoying having to enter my password/pin every time, but still better than no screen saver or sleep mode at all.

Nope. Every major update, and some KB updates my Screensaver goes South!

FACT: Screen saver works normally.

MS Update applied: Screen saver no longer works!

Why does MS offer no solution, no tool to ascertain WHY the screen saver won't trigger?

I'm using an NVidia Graphic Card so its not some esoteric weird piece of hardware with obscure drivers.

Actually, my problem didn't start with the 1903 update, but with the October 8, 2019—KB4517389 (OS Build 18362.418)—update to 1903, which my system installed on 11 October.  It is otherwise as described—nothing fixes it.  I’m forced to turn off my display at night.  I forgot to specify, but I've got an Nvidia graphics card, for which I reinstalled the latest update—no joy.

I filed a bug with Microsoft, but my bet is that nothing will happen until some future update will mysteriously fix the problem, and no explanation or apology will be forthcoming.

Followed these steps, didn't resolve the failing screensaver activation issue.