I installed Ubuntu 14.10 a week ago. Everything was ok except some minor audio problems which I detailed in a previous post.
Currently as far as I can see networking is not working at all - no wireless if I'm on Wi-Fi - no Internet if I'm on cable It also doesn't work in safe mode.
I tried most of the things I have seen on forums at network problems (changing failsafe config, changing networking config, etc). Currently I just left the first 2 lines for network config as described in this question: "waiting for network configuration" Problem