I want to say again what the lighting here. Partial is to speak of a supposed bug is no longer running out of light. The problem I had, but I also know what the reason is.
I looked up as the hand detection works. In the palm rest are infrared sensors. Infrared rays are heat rays and the human body are nunmal heat. To detect a keyboard if approaching the hands. Now to the problem, if you sit on the couch and the K800 laying on the lap is the Belechtung no longer sufficient, because our body gives off heat and so the keyboard will light. If you raise it up (do not hold on to the palm rest) the lighting goes out again.
Who has the money, who gets a great keyboard!