[TESTING] Linux 4.9 kernel and improved video stack for Vero 4K / 4K +

Working quite well so far. One thing I noticed, however, is that if a particular film had a different Contrast setting other than the default of 50, it always plays initially with a default Contrast setting of 50. If I make any adjustment to the Contrast it’ll play at the new value. For example, if I have a 4K film that I’ve set with a Contrast of 58, lowering it to 57 makes the picture brighter (because it actually adjusted the Contrast from 50 to 57).