stop lubuntu 11.04 blanking screen.
etc etc etc
Turns out lubuntu 11.04 uses xfce4-power-manager-settings. So to stop the screen blanking / going to sleep / turning off all you need to do is press ALT F2 (Run command) then enter
xfce4-power-manager-settings
and then you can set the screen to never turn off! Yay
Don’t know why this isn’t in the System or Preferences menu…