Thank you for that! The built in Mac display brightness controls only seem to work for the Apple Cinema Displays - they do nothing on my Asus monitor. I just t

Thank you for that! The built in Mac display brightness controls only seem to work for the Apple Cinema Displays - they do nothing on my Asus monitor. I just tried ddcctl ( https://github.com/kfix/ddcctl https://github.com/kfix/ddcctl ) - and it worked perfectly over HDMI through a HDMI switch. I didn't even know what to look for - so this comment was a lot of help.