wireless - Weak WiFi signal in Ubuntu on HP G240 G5 - Ask Ubuntu

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i had purchased new hp 240 g5 laptop. wifi working windows in ubuntu 16 wifi signal comes weak. below laptop wifi details,

*-network        description: wireless interface        product: rtl8723be pcie wireless network adapter        vendor: realtek semiconductor co., ltd.        physical id: 0        bus info: pci@0000:02:00.0        logical name: wlp2s0        version: 00        serial: xx:xx:xx:xx:xx:xx        width: 64 bits        clock: 33mhz        capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless        configuration: broadcast=yes driver=rtl8723be driverversion=4.4.0-21-generic firmware=n/a ip=192.168.43.178 latency=0 link=yes multicast=yes wireless=ieee 802.11bgn        resources: irq:17 ioport:3000(size=256) memory:c1000000-c1003fff 

first installing realtek wifi driver in ubuntu, use below commnad same.

#sudo apt-get install linux-headers-generic build-essential git #git clone https://github.com/lwfinger/rtlwifi_new.git #cd rtlwifi_new #make #sudo make install #sudo modprobe rtl8723be 

disable wifi power saving mode below command.

#sudo vi /etc/modprobe.d/rtl8723be.conf , type below parameter in above file. options rtl8723be fwlps=0 

now test wifi on slot working below commands,

#sudo modprobe -r rtl8723be #sudo modprobe rtl8723be ant_sel=1 #iwlist scan | egrep -i 'ssid|quality' 

or slot 2

#sudo modprobe -r rtl8723be #sudo modprobe rtl8723be ant_sel=2 #iwlist scan | egrep -i 'ssid|quality' 

if working on slot one,run below command,

#echo "options rtl8723be ant_sel=1" | sudo tee -a /etc/modprobe.d/rtl8723be.conf , if ant_sel=2 better, #echo "options rtl8723be ant_sel=2" | sudo tee -a /etc/modprobe.d/rtl8723be.conf 

at last reboot system #sudo reboot. done!

for more refer http://www.syshunt.com/hp-ubuntu-16-linux-mint-weak-wifi-signal-problem/