Yes, it is interesting that xrandr (X11 session) reported 4 connected displays, but KDE (via kscreen-doctor) only reported 3 active displays. That does appear to be the crux of it.
Yes, it is interesting that xrandr (X11 session) reported 4 connected displays, but KDE (via kscreen-doctor) only reported 3 active displays. That does appear to be the crux of it.
This blog may be of value to you…
https://notmart.org/blog