There were many reasons why i ditched the Surface Pro (After 6 of them), was among other things the incredible annoying "auto brightness" bug. It is on my Surface Pro 3 too. And... no matter what i do, it won't go away. Can anyone help? PS: It's not really auto brightness, but a gentle dimming of the display once in a while. It is totally uncool on a screen that is supposed to help me get colors right for clients and so forth. Its driving me nuts!