I recently installed Lubuntu 14.04 on my ASUS EeePC 1015PEM and set up everything i needed and its working just the way i want except for one thing my screen keeps switching after about 20 mins or so, here is what i've done and the problem still presists:
Set monitor options in power preferences to never sleep/switch off for both battery and ac
In Light Screen Locker settings i have bother Blank and Sleep set to never.
This wouldnt be a huge issue for me but i watch alot of tv shows and anime and its sucks having the screen switch off in the middle of an episode.