Maybe the ifupdown plugin is missing in the configuration. Can you try with the following :
[main] plugins=ifupdown,keyfile
[ifupdown] managed=true
By the way, you should better restart the network manager after changing its configuration, not networking : /etc/init.d/NetworkManager restart
Maybe the ifupdown plugin is missing in the configuration. Can you try with the following :
[main] ifupdown, keyfile
plugins=
[ifupdown]
managed=true
By the way, you should better restart the network manager after changing its configuration, not networking : d/NetworkManage r restart
/etc/init.