Lubuntu based on Ubuntu 16.04LTS
When I click on Light locker settings it does not show the menu for light-locker and worse I noticed that my screen does not dim at all
In order to make Screen dim work I installed xscreensaver but did not work either: When i clicked on the screensaver icon in /usr/share/applications it said the following:
The XScreenSaver daemon doesn't seem to be running on ":0". Launch it now?
In order to launch it automatically I added xscreensaver -nosplash in
Preferences -> Default Applications for LXSession -> Autostart
Now it is automatically started and after I adjusted the timings for the screensaver it works as intended.