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Extremely weak WiFi signal on Ubuntu : RTL8723BE

This things are happens with some particular computer where the wifi driver is realtek rtl8723be & this occurs when we install from any linux based distributions on that particular machine. Realtek rtl8723be wireless network adapter has problems in managing the antenna on Linux. In ubuntu default kernal uses the wrong antenna for wifi. This will lead the weak wifi signal problem.

Follow this procedure will help to get rid of this problem, this things works on my machine. Hope it will works on your machine also.

* sudo apt-get install build-essential git
* git clone https://github.com/lwfinger/rtlwifi_new.git
* cd rtlwifi_new
* sudo make
* sudo make install
* sudo modprobe -rv rtl8723be
* sudo modprobe -v rtl8723be ant_sel=2
* echo "options rtl8723be ant_sel=2" | sudo tee /etc/modprobe.d/50-rtl8723be.conf
* reboot

Note :
* This problem occurs again if you updated the kernel, then you need to install driver again.
* Don't change any wifi settings in windows. windows works when it is set to zero because the vendor of your wifi card designed it to be controlled by windows software, not linux, so windows will choose the best connection no matter what it is set to. Linux/Ubuntu usually works best with "ANT sel =2".That command is to select the antenna connection there are two connections 1 & 2. So first try 2, then reboot  and test wifi. If not works then try with 1.
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