Tell me more ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.
up vote 1 down vote favorite

My laptop screen brightness just keeps on increasing and decreasing in a loop.

Is there some setting that I have messed up? I am sure the machine should be okay, because it is pretty new still.

I am using Windows XP, and the machine is a DELL Latitude E6400.

share|improve this question

1 Answer

up vote 1 down vote accepted

I don't know for this specific laptop, but some laptops have a light sensor that can be used to automatically adjust brightness.

The loop effect can comes from a bad configuration of the electrical network frequency which induce a resonance frequency.

share|improve this answer
Hmmm, I keep my light sensor switched off in my Latitude; however, the brightness arbitrarily changes sometimes. Keeping the light sensor switched on makes the brightness change in accordance with ambient lighting. – Suman Krishna Saha Jan 1 '12 at 16:51

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.