12.2 : Network Manager no more wifi connection

I’ve spent 2 hours reading the forums and searching the internet. And no success.
Here is my problem.
I use networkmanager on three laptop to connect to my home wifi.
I use wpa2 personnal.
I have configured the connexion via the networkmanager plasmoid/applet that appears in the left bottom corner of the kde screen.
I configured this connexion for a manual local network address (192.168.x.y). I have entered everything, like, subnet mack, gateway, dns and so on.
And, usually, it works.
I don’t always use wifi. I prefer ethernet. But sometimes, i have to use it.
I just press the wifi activation shortcut button on the keyboard. The wifi light goes on. Networkmanager/kwalletmanager asks me for the password. And wlan0 appears in bottom left corner.
And since a few days/weeks ago (i don’t know because i don’t remember), it just doesn’t connect anymore.
Is it due to a recent update ?
I don’t know.
All i can give you is this :


--root@hostname 11:23:00 /home/chris] tail /var/log/NetworkManager
Nov  8 11:19:58 hostname NetworkManager[679]: <info> (eth0): carrier now OFF (device state 100, deferring action for 4 seconds)
Nov  8 11:20:02 hostname NetworkManager[679]: <info> (eth0): device state change: activated -> unavailable (reason 'carrier-changed') [100 20 40]
Nov  8 11:20:02 hostname NetworkManager[679]: <info> (eth0): deactivating device (reason 'carrier-changed') [40]
Nov  8 11:20:02 hostname NetworkManager[679]: <info> Clearing nscd hosts cache.
Nov  8 11:20:04 hostname NetworkManager[679]: <info> WiFi now enabled by radio killswitch
Nov  8 11:20:04 hostname NetworkManager[679]: <info> (wlan0): bringing up device.
Nov  8 11:20:04 hostname NetworkManager[679]: <info> (wlan0): supplicant interface state: starting -> ready
Nov  8 11:20:04 hostname NetworkManager[679]: <info> (wlan0): device state change: unavailable -> disconnected (reason 'supplicant-available') [20 30 42]
Nov  8 11:20:04 hostname NetworkManager[679]: <info> (wlan0): supplicant interface state: ready -> inactive
Nov  8 11:20:04 hostname NetworkManager[679]: <warn> Trying to remove a non-existant call id.

Any clue ?