Hi philm,
after stable-update-2020-11-18 I had a black screen after boot (Black screen after [Stable Update] 2020-11-18) although I had the latest sddm version. I kept upgrading and this update also did not solve the issue, but downgrading to sddm 0.18.1-3 solved it.
So I think perhaps there might be something that manjaro team can do, so I don’t have to stay on that version “forever”, or do I need to file another sddm bug report?
Perhaps you could add it to the Known issues and solutions section.
This seems to be different from the PAM and PAMBASE issue, since I don’t have a system-auth.pacnew