Created attachment 618432 [details]
as you can see, the connection is grayed out and you can read the log while i
click on the connection.

hello guys!
i have encounter a really ugly bug in network manager. what is strange is that
it happens randomly. while modem is inserted in the usb port, the plasma-mn
shows the 3g connection grayed out. when i click on the connection, nothing is
going on, actually, it does, as you can see in the screenshot of journalctl -f. 
being very desperate, since i cannot connect to the internet, i have replaced
stock network manager with this one: 
https://bugzilla.opensuse.org/show_bug.cgi?id=905639
you also can watch the discussion here:
https://forums.opensuse.org/showthread.php/502287-kde4-network-manager-plasmoid-doesn-t-work/page3
my name on the forum is rich1974.

it is very frustrating since i cannot connect to the internet, i am posting
this report using ubuntu 14.04