I confirm that settings are either not (always) persistent or not
(always) effective.

At my uncle's place, I have to configure manually the gateway (because
the Wifi router is connected to the DSL router with a LAN port, not with
the WAN port. Don't ask me why). If I change the gateway in manual
settings in Knetworkmanager, the new gateway is not taken into account:

- I change the gateway IP;
- I apply the changes;
- the new gateway IP is displayed in Knetworkmanager but the old gateway IP is 
displayed by ifconfig (the later is effective so the connection does not work);
- I close and open knetworkmanager manual config window which then show the old 
gateway IP.

So I stopped Knetworkmanager and configured the network in command line:
"sudo route del default; sudo route add default gw 192.168.0.1" and it
works.


I say settings are not **always** persistent because at my aunt's place, 
knetworkmanager recognized the Wifi AP name and connected right away: it means 
it had saved the WPA key more than 1 year ago. The security problem is I don't 
know where this is saved because I don't use Kwallet and I don't have any 
network profile in Knetworkmanager!

-- 
Wireless Network settings not persistent and not effective 
https://bugs.launchpad.net/bugs/226487
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