You said "This doesnt happen when its plugged in".
I assume you mean plugged in to the mains, and not using it just off the battery.
If so, I am guessing this is a feature of running it off the battery to save battery power.
Just got my HP dv6 7010tx laptop and i've noticed that the brightness of the screen changes when I alternate between dark and light backgrounds.
It happens exactly like the way if brightness is adjusted manually, there is usually a 2-3 step increase/decrease and then the screen settles down. I tried few driver updates but that too din't help...
This doesnt happen when its plugged in.
Also when the screen turns on(after being off due to inactivity) there is a two step increase in the brightness and this happens even when the charger is plugged in.
Any idea what the problem is???
Win7 home premium