SUMMARY When I log into plasma-wayland through whether sddm or startplasma-wayland, bluetooth power turns off ( I'm tracing this on another tty running bluetoothctl ) no matter what is configured in System Settings/Bluetooth/Configure…/On login. Also, set AutoEnable=true in /etc/bluetooth/main.conf has no effect in bluetooth status. The issue happens with a high possibility, while there's no such issue with X11 session. STEPS TO REPRODUCE 1. Start a plasma-wayland session ( logged in ) 2. Wait until plasma-shell has been loaded 3. Observe the bluetooth status from bluedevil interface OBSERVED RESULT Bluetooth switched to off no matter what is set EXPECTED RESULT Bluetooth restored previous status as is set in "Configure…" SOFTWARE/OS VERSIONS Operating System: Arch Linux KDE Plasma Version: 5.27.5 KDE Frameworks Version: 5.106.0 Qt Version: 5.15.9 Kernel Version: 6.3.6-arch1-1 (64-bit) Graphics Platform: Wayland ADDITIONAL INFORMATION I don't know how bluedevil controls bluetoothd, so I guess maybe the configuration file ( if it does exist ) is based on X11, and you could check the configuration file for wayland session ( if it exists and not synchronized with gui options in settings ).
I found a temporary solution as mentioned in Bug 469119. I think bluedevil on Wayland could not write to ~/.config/bluedevilglobalrc properly ( but read works well ). On X11 session, bluedevil can synchroize with configuration file properly.
*** This bug has been marked as a duplicate of bug 469119 ***