I am on Manjaro KDE plasma. I came across whenever I want to connect to a secondary display via HDMI (smart TV and Projector) the second display remain black.
I found a way to get it work by, going to display configuration and then changing the refresh rate of the secondary monitor or by reducing the resolution of the secondary monitor. It works well but is this the best way to fix it or is there another way? I saw lots of problem regarding this and I just wanted to share my experience and also to know about this issue.