Hi,
it's not clear to me what you mean with "When I activate the deconnection screen in the configuration", this is normally activated by default and when you try to logout, reboot, shutdown etc., for instance from the bottom buttons in the application launcher menu, this screen appears for confirmation. So, you simply mean that you can never normally logout, reboot or shutdown from Plasma or are you describing a particular situation?

If your case is the general issue this is not normally reproducible (those buttons are tested as working for me on many installations), so something bad may be happening on your particular installation and the cause might be reported in the user or system journal. You may want to check there or send a system report generated by the tools tyou may find in the applications menu.

If, on the contrary, the problem is reproducible in a particular case, can you please explain me better which configuration changes you have made and where you are clicking to ask for logout, reboot, etc. Thanks.

Hi,
it’s not clear to me what you mean with “When I activate the deconnection screen in the configuration”, this is normally activated by default and when you try to logout, reboot, shutdown etc., for instance from the bottom buttons in the application launcher menu, this screen appears for confirmation. So, you simply mean that you can never normally logout, reboot or shutdown from Plasma ?

Yes Silvan,

If I keep the default setting to have the logout confirmation screen the buttons to turn off or restart the machine or log out don't work, but the other buttons work (standby, locking, changing user).

By deactivating the deconnection screen, all buttons are working fine.

Thanks.

Hello,
I don't reproduce the problem, I've also tried both X11 and Wayland sessions and searched in KDE bugs.
Can you open a terminal and run:
journalctl -f

then try to logout to reproduce the problem and see if some useful message appears on the terminal?

Hello,
journalctl -f
then try to logout to reproduce the problem and see if some useful message appears on the terminal?

Hi Silvan,
This is what appears in the terminal :

mars 30 20:15:09 openmamba dbus-daemon[6819]: [session uid=1000 pid=6819] Successfully activated service 'org.kde.LogoutPrompt'
mars 30 20:15:09 openmamba ksmserver-logout-greeter[8068]: kde.logout_greeter: Couldn't find a theme for the Shutdown dialog ""