I'm using ethminer version 1.1.0 Build: Linux/g++/JIT/. that came bundled with webthree-umbrella. It works great on ubuntu 14.04

Here is my cpu only command line:

./ethminer -C --allow-opencl-cpu -F http://eth-us.dwarfpool.com:80/040fc5e5ac72edb8b27dcc19ba56176e2b4fb0ac/CPU