I am running lubuntu 12.04. I would like to completely disable the screensaver. Here's what I've done so far:
1. Under Preferences | Power Manager | On AC | Monitor: set both sliders for Monitor to 0 (Never).
2. Under Preferences | Screensaver Preferences: set Mode to Disable Screen Saver.
3. Under System Tools | dconf-Editor, org | gnome | desktop | applications | screensaver: idle-activation-enabled and lock-enabled unticked.
4. apt-get purge xscreensaver xscreensaver-data
The display still blanks after 5-10 minutes. Any idea what I missed?