Plasma wifi issue

plasma, how to keep wifi alive when logout and switch others WM?

A wifi connection is user based as far as I know. Which means that the connection is only kept when the user is logged in.

I assume the reason for this is that every DE/WM has their own way of managing connections.

Have you tried checking the “Make this connection available to all users” checkbox in kcm_networkmanagement?

(If you are using Plasma Desktop, you will find the option in System Settings. If you are using Plasma Mobile, you will have to manually bring up the desktop version of the configuration module using kcmshell5 networkmanagement because the mobile version does not offer that option. (That command also works on Plasma Desktop, but it is not needed there because the same module is available through System Settings.))

found it, thanks.