If it doesn't work with the generic driver, try this step with your System Manufacturer's driver. Did you check under "Sound Settings" of your Windows if the chosen input device is correct? If the issue persists after doing the previous steps, please attach the SSU report of...
That's also what I'm thinking but I don't really have anything exotic plugged in. I will give it another go with nothing plugged in though just to make sure. I already tried the second port on the 6900 XT but it doesn't work either. ...