Lenovo Y40-80 Wifi driver problem on Ubuntu 14.04

lenovo_y_40_80.md

Install new WiFi deriver for Lenovo Y40-80 on Ubuntu 14.04

    install required packages

    sudo apt-get install linux-headers-generic build-essential git

    git clone new realtek wifi modules

    git clone https://github.com/lwfinger/rtlwifi_new/

    enter the directory

    cd rtlwifi_new

    build it

    make

    install

    sudo make install
    

Now you can reboot or unload/load modules

    unload modules

    sudo modprobe -r rtl8723be

    load new module

    sudo modprobe rtl8723be