thinkpad e440 rtl8723be

#uname -a

Linux ubuntu 3.13.0-30-generic #55-Ubuntu SMP Fri Jul 4 21:43:42 UTC 2014 i686 i686 i686 GNU/Linux

#git clone https://github.com/lwfinger/rtl8723be.git

#git checkout 604aa9058fb9e5bb1cf571c99989d081f8fc8b9

#make

#sudo make install

#sudo modprobe rtl8723be