16.04: Screen-saver stopped working?

[Josef Wolf]

Hello,

On my laptop with 16.04, screen saver won't lock the screen anymore.

According to system-settings, screen-saver should be activated after one
minute and should ask for the password. But there's simply nothing happening.

I even rebooted to make sure all servicess are started as it should be. But
this also did not help.

Any hints how to track this down?

-- 
Josef Wolf
jw at raven.inka.de