Wifi not getting detected in Ubuntu 16.04

I have installed Ubuntu 16.04, and I am not able to see any wifi signals. Sometimes, even though wifi signals are detected, I get connected for few seconds and the signal is also too weak.

I have tried the following command

$sudo lshw -C network

*-network
description: Wireless interface
product: Wireless 3160
vendor: Intel Corporation
physical id: 0
bus info: pci@0000:03:00.0
logical name: wlp3s0
version: 83
serial: d0:7e:35:bc:a6:ab
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress bus_master cap_list ethernet physical wireless
configuration: broadcast=yes driver=iwlwifi driverversion=4.10.0-37-generic firmware=17.459231.0 latency=0 link=no multicast=yes wireless=IEEE


So, I conclude that my wifi driver is iwlwifi and it is installed. But I am not sure what to do exactly?

6 Answers
6

In Linux It is better to use your own USB to LAN Modem. It's the best solution.

Is it a Dell laptop?

I'm using Ubuntu 16.04 with Dell Laptop and I strongly believe that it is a driver issue. I have other friends who tried using Ubuntu with a Dell laptop and also had the same problem.

One of those friends migrated to Elementary OS: https://elementary.io/
and is very satisfied with the hardware support (his wi-fi is working), but the OS still has some minor problems.

Yes! It is Dell Laptop. I have used Ubuntu 14.04 and it had no wifi issues. So did Debain Jessie and Strech.
– Haritha
Oct 19 '17 at 18:14

Try the generic wifi drivers as firmware-ilwifi if this solve your problem.

sudo apt-get install firmware-ilwwifi
reboot


If doesn't running :

please download this file to your desktop:

https://wireless.wiki.kernel.org/_media/en/users/drivers/iwlwifi-8000-ucode-25.30.13.0.tgz

as well as this:

https://wireless.wiki.kernel.org/_media/en/users/drivers/iwlwifi-8000-ucode-15.227938.0.tgz

Right-click each and select 'Extract Here.' Now, back to the terminal:

sudo apt-get update
sudo apt-get install linux-headers-generic build-essential
cd ~/Desktop/backports-3.18.1 //where your download are stored
make defconfig-iwlwifi
make
sudo make install


It shows unable to locate package.
– Haritha
Oct 19 '17 at 18:18

i did a update cos this runing for debian jessie, wheezy ... but for ubuntu try the add the headers and make with a backports version i guess is not version stable but is working.
– user8556290
Oct 19 '17 at 18:22

How can I reinstall the driver iwlwifi for ubuntu 16.04?
– Haritha
Oct 20 '17 at 11:31

@Haritha did you tryed the step if doesn't running in my Post?
– user8556290
Oct 20 '17 at 11:32

There should be a message that the needed firmware is not found. If so, please download this file to your desktop: wireless.wiki.kernel.org/_media/en/users/drivers/… as well as this: wireless.wiki.kernel.org/_media/en/users/drivers/… Right-click each and select 'Extract Here.' Now, back to the terminal:
– user8556290
Oct 20 '17 at 11:36

Please Type the following command and you will get full WIFI signal:

sudo modprobe -rv rtl8723b

sudo modprobe -v rtl8723be ant_sel=2


I have tested it on Ubuntu 16.04.

Try restarting networking service

sudo /etc/init.d/networking restart


Also restart your network manager

sudo service network-manager restart


If it doesn't work then configure the static ip by opening network interface (command given below) and then restart networking service

sudo gedit /etc/network/interfaces


restart the network manager

network manager

sudo service network-manager restart


kill the nm applets

nm applets

killall nm-applet && nm-applet &


restart

sudo shutdown -r now


This worked for me.

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