Since upgrading to XPS 15 with 4K screen, I've noticed that when watching videos with dark scenes, the results are terrible. The display seems very blotchy as though the screen can't display many dark shades resulting in mostly the same color being displayed in large portions of the screen. The videos are not Hi res, just 720P but doesn't seem to mater as it happens on any source video resolution (they look fine on a normal HD screen on a different laptop). I've installed the latest drivers from the Dell site. Has anyone run into this problem, I'm not sure if its a hardware issue on my system, some setting or a driver issue?