Brighter display with mouse and keyboard plugged in

I have an RX 480 and recently, I've been having some display problems. The screen looks too bright or milky, even though I haven't altered any brightness settings on my monitor or in the driver. When I go into a game or change any display settings, the brightness disappears, but returns when I reboot. I've removed the drivers completely, reinstalled them and everything, but the problem still persists. I know it's not a GPU problem because the games look great, there's no texture problems and isn't affected by the brightness problem when I'm on my desktop. I'm beginning to think the latest AMD driver is the problem, but when I'm in games everything is fine.

Another strange thing is that when I have my USB keyboard and mouse plugged in, the brightness is there and my boot times are considerably slow. Without the keyboard and mouse plugged in, I get no brightness and my boot times are blazing fast.

I came across this issue when my keyboard light began to randomly flash, but it isn't faulty because I tried another keyboard and still the same problem. My current keyboard hasn't had any problems since that flashing happened. I can't see it being a faulty USB port because I've tried other devices and they work fine. I've never come across such an issue before.

My RGB settings are all fine and I've turned off adaptive brightness. I still have the same problem.




Anyone have any ideas? Thanks.