Forum thread here. https://forum.artixlinux.org/index.php/topic,4689.0.html#info_29977 Wayland does not load at all after sddm. Screen goes black then sddm reopens. Using Artix linux (rolling) SUMMARY *** NOTE: If you are reporting a crash, please try to attach a backtrace with debug symbols. See https://community.kde.org/Guidelines_and_HOWTOs/Debugging/How_to_create_useful_crash_reports *** STEPS TO REPRODUCE 1. 2. 3. OBSERVED RESULT EXPECTED RESULT SOFTWARE/OS VERSIONS Windows: macOS: Linux/KDE Plasma: (available in About System) KDE Plasma Version: KDE Frameworks Version: Qt Version: ADDITIONAL INFORMATION
From that forum thread, the "cannot open display" thing is the problem here, and this will be a distro setup issue. Please report it to your distro.