I'm using Lubuntu 18.04 (or 10, don't recall). In the last couple of days, my screensaver lock has stopped working. It was working fine a few days ago. My screensaver would kick in and in order to get back to the UI, I had to enter my PW. I noticed that in the screensaver configuration, the "Lock screen after" option was not checked. I have rechecked it but it still is not working. My screensaver starts and when I press a key, the UI comes back without having to enter my password. Is there some other setting that needs to be set?
I found another post from someone talking about the same thing but for Xubuntu. In there it said to run the following command (env | grep -i manager) and post the results. Not sure if this will help with Lubuntu but here are the results from running it: