Mac mini
Using new Mac mini (2020/M1) with a Dell S3221QS monitor. Connecting with HDMI cable. Cannot get the volume key, brightness keys to work. Launchpad, Mission Control, Pause/Play/FF do work. In order to adjust volume I have to either use the app or click on monitor controls to do so (cannot adjust in system preferences, no option for input). Any suggestions would be welcomed.
Mac mini