Just a thought here, but isn't this the feature of the light sensor? There are two of them in that particular area....
HTC One, ViperOne
, Nokia X3-02.5 for work
Before: HTC One X
, HTC Desire S
(my wife's now...), HTC Legend, Asus P750, SE W800i, SE K700i, SE T610i, Panasonic GD67, Ericsson T10...
" if your read anything helpfull, that's the least you can do
My BatteryMOD, BootAnim