How to disable the black screensaver

[Artefact2]

I use XFCE4 (I used GNOME before) and SLiM.

How do I disable the black screensaver which comes after some time of inactivity ?

I have no option "screensaver" in my menu.

Thanks for your help.

[fronclynne]

xset -dpms

maybe?

[SirDice]

Xfce doesn't have a screensaver, the black screen is DPMS (powersave).
You may want to install xscreensaver.