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I have recently installed ubuntu 14 in my system alongside windows8.1. While the wifi works perfectly fine in windows, i am getting very low signal for the wifi connection. Most of the time I have to restart the connection via terminal (network manager restart) to get the wifi working. And even so if I move away a little, the wifi connection is lost. What could be the problem?

P.S. I am using an HP 15 af006ax notebook. My wifi router is Tp-link wr740n wireless router .

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Can you check if there is any driver listed for your wifi card under system>software upgrades>additional drivers – Arup Roy Chowdhury Nov 20 '15 at 4:49
    
I Checked it . Other than the display driver , there is nothing . – Jayakrishnan Menon Nov 21 '15 at 7:07
    
In your case you need kernel 4.2 with realtek drivers for connection to work well. Please use Wily 15.10 or add mainline kernel ppa to get kernel 4.2 – Arup Roy Chowdhury Nov 21 '15 at 10:43
    
I understand what you said but how do i add Wily 15.10 or add kernal ppa ??(I am a noob when it comes to linux) – Jayakrishnan Menon Nov 22 '15 at 6:32
    
@ArupRoyChowdhury Also i read in another thread that it might be because i am using 802.11 b on my laptop whereas my wifi is configured for 802.11n ,, or vice versa .. I dont have the configuration of my wifi router as of now , but if this is the case I can look up and find out the wifi configuration asap . – Jayakrishnan Menon Nov 22 '15 at 6:41
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The problem is in antenna slot, the ubuntu goes for slot 1 (default). But in HP 15-af006ax the antenna connection is in 2nd slot. You can change it by,

sudo modprobe -v rtl8723be ant_sel=2

and for making it permanent,

echo "options rtl8723be ant_sel=2 fwlps=0" | sudo tee /etc/modprobe.d/rtl8723be.conf

thats it your problem must be solved after this i got it working the same.

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