When I boot into my Manjaro KDE, it says that the Display Manager failed to start. I then login from console and try startx. But it seems like something were missing. I can't even download it since I don't know how to connect to the Wi-Fi through the konsole. I tried iwctl but it didn't recognize the command...What should I do?
I've run into this problem before when installing a new desktop environment; it happened when I forget to enable my new one. Try
sudo systemctl -f enable gdm.service if you have gnome installed also or do the same thing except can gdm.service with your previous Display Manager (ex.
sudo systemctl -f enable sddm.service) I hope this helps!
Source for command(s) mentioned in this answer: https://linuxconfig.org/how-to-install-gnome-desktop-on-manjaro-18-linux