Replace gnome-screensaver with xscreensaver Ubuntu
XScreenSaver is the standard screen saver collection for Linux system running the X11 Window System.

If you want to remove gnome-screensaver, simply copy the following command in the terminal, open terminal (Alt+F2 and type: gnome-terminal) and insert following commands:

xscreensaver-demo will show the configuration dialog, that you see in system=>preferences.

Configure your standby/suspend/screen off from xscreensaver.
Now you have to add start-up entry: go to system>preferences>start-up applications, click add after entering name add command "xscreensaver -nosplash".

Latest update is here
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