Ok, so I updated my system to 14.04 last week (running on a Dell XPS13 ultrabook- but I'm not a developer, not particularly technically minded). Some strange things happened with network manager.
First, it stopped communicating with my 3G modem (Sierra Aircard 312U). Around $100 later I have a 3G router broadcasting a wireless signal that I can hook up to (although Ubuntu lost the signal overnight and I had to restart the computer to get it communicating again).
This has been deeply frustrating and unwelcome. But its not the weird bit.
I have two unknown networks listed in the Network Manager's dropdown box. The first is for a "Galaxy Note3 Network". The second is for "Tsai's iPhone Network". Wifi networks, (including my phone's hotspot) and all the usual stuff is listed below these two.
(If I tether my phone to the computer to access the internet (i.e. hook up a cable), the list says "wired connection 1", then Tsai's and Galaxy Note3 would appear next, with wifi options in a section below that).
I cannot edit connections for either of these new networks, or gather any settings info at all - or even delete them. They are persistent across restarts.
Any ideas? Anyone else? Have I somehow been hacked by a clumsy infiltrator? I downloaded the update from the Australian mirror.
Picture of the menu