reference:http://forum.ubuntu.org.cn/viewtopic.php?t=462588
1 Install the things you need to compile first
sudo apt-get install linux-headers-generic build-essential git
2 CD switch to need to put rtlwifi_new into the directory, then execute
git clone http://github.com/lwfinger/rtlwifi_new.git
3 Stop the network first
sudo service Network-manager stop
4 CD to Rtlwifi_new directory
sudo make
sudo make install
sudo modprobe-v rtl8723be fwlps=0 ips=0
5 sudo reboot restart
6 confirm whether to close Fwlps=n ips=n
Systool-v-M Rtl8723be
This completes the first installation of the Rtl8723be driver.
If it is not the first time after the 3rd step remove uninstall old wireless Card driver
$ sudo modprobe-rfv rtl8723be
If you look at Fwlps=y ips=y, echo "Options rtl8723be ips=0 fwlps=0" | sudo tee/etc/modprobe.d/rtl8723be.conf
ubuntu16.04 Wireless Card RTL8723BE Installation