I've an annoying problem with my Inspiron 17R N7110. The adaptive brightness/ambient light is very annoying and it seems like there's no way to disable it. I've been reading threads on other forums and it seems like other people have the same problem, even with other models.
Here is the issue...My battery is not the greatest, but it is not bad either. When I am running off battery power, I hardly get lag in Deus Ex. Once I need to plug in my AC adapter, it still runs okay for the most part, but there are random lag spikes.