Stop Display Brightness Goes Dim In Ubuntu On Battery

After installing ubuntu desktop edition on my hp laptop with vista in a dual boot configuration, I faced all these problems like configuring wireless on ubuntu with broadcom and then how to install my favorite twitter client – tweetdeck on ubuntu.

After solving all these problem I noticed a quite different problem which relates with the display of my laptop screen which goes dim or brightness decreases to a great level if I run ubuntu on bettery. But when I run ubuntu on charger it runs with approprite brightness.

After some play around in ubuntu I was able to fix the display brightness getting dim on battery, lets see how I fixed this problem

To stop your brightness level to change when you change power mode of your laptop from charger to battery follow the procedure given below

1. Go to System >> Preferences >> Power Management


2. Click the tab On Battery Power under Power Management Preferences, uncheck the checkbox under Display which says Reduce backlight brightness

3. click close button

Now whether you are on battery or charger on your laptop the display brightness will not change until you set it to change.


  1. marc says

    Thanks a lot. I am looking at running ubuntu on my busted laptop and the insistent and continuous dimming was oh so annoying.

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