I'm using a Dell Inspiron N5110 laptop with Ubuntu 13 and I find that every time I plug the power in to charge, the screen brightness dims. If I go into the brightness settings window the brightness immediately goes back to full brightness (as they are set) without me changing anything. In order to keep the screen brightness on full I have to keep the brightness settings window open in the background. As soon as the battery is charged the brightness drops again until I unplug the power again. This happens every time and now I know how to get round it it's not a huge problem but still quite annoying. Any advice would be gratefully received. Let me know if you need any more info.
I'm quite new to Ubuntu so if you can give me nice simple instructions that would be great :)