Just installed Antergos from the latest ISO. The install was fine (apart from my missing configuring a swap partition - whoops…). I’m using Xfce.
While setting things up, I attempted to install a printer. I have a Brother laser which hangs off a Slackware server. I started cups and the cups-browsd services, then opened the Printer Settings application from the menu. It comes up as it should, but clicking on the “unlock” box does nothing at all. I found that by using the Server > Connect menu option, I was able to see the server which hosts the printer, and fill in the details of the printer. However, I was then unable to go any further - the forward button was greyed out.
So, can anyone tell me what I’m missing? Polkit is started and seems to be running. I could not find a graphical authentication agent, so I installed polkit-gnome, but either I don’t know how to start it correctly, or it isn’t what is needed.