Wifi not getting detected in Ubuntu 16.04


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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