[NAME] did this just start happening in the past few days? I heard something similar from someone on the Discord server yesterday and it happened after recent Windows Updates.  It's possible that one of the recent updates is conflicting with a display or graphics driver. I would try going directly to Intel and Nvidia/AMD to find the most recent graphics driver. You can also try updating the Alienware OSD driver.  You can also try finding a restore point before the latest updates. This could reverse the issue and help pinpoint the reason.   
My screen brightness will not go up or down. Help.
Area-51m R2, screen brightness will not change, #2