Troubleshooting Ubuntu 20.04/18.04 LTS Wifi Problems

Last week I installed new ubuntu 16.04 LTS. Everything looks very good and it’s better than previous LTS’s from Canonical. But Ubuntu 16.04 have serious Wi-Fi problems. I am unable to turn on the Wi-Fi on one my PC’s. Previously I faced a lot of Wi-Fi connection problems in ubuntu 14.04 but in this particular case I am not in the position to Turn On the Wireless connections.

Let’s try to troubleshoot this Wi-Fi problem:

If I try to turn on the Wi-Fi from the top right menu, It is not starting and saying “link is not ready”.
Here is the dmesg output.
Then I checked Wireless card details using lshw and lspci and here are the details.

It is “Intel 3165 dual band card”
Note that my lshw command output saying “Wireless network disabled”
But still, I don’t have any clue about this. Then I went ahead tested rfkill command.
Here is the output of rfkill list.
It is saying “Acer wireless LAN, Soft blocked : yes”
Now I got it. This is happening because of Conflict between the acer-wmi kernel module and my intel driver module.
So I need to disable acer-wmi kernal module.

How to Solve rfkill list Soft blocked :yes problem :

Open your terminal and try the following commands one by one.

sudo modprobe -r acer-wmi
cd /etc/modprobe.d
sudo vim blacklist.conf

Then add the following line at the end of the blacklist.conf file.

blacklist acer-wmi

Then press :wq to save the changes and exit, Then reboot your system.
Bingo..!! On your next reboot, Ubuntu 16.04 LTS will detect the Wi-Fi networks, Connect to your desired Wi-Fi network and enjoy. Here is my screenshot, Finally ubuntu able to detect Wi-Fi networks.


Hi Guys, I am Venkatesh. I am a programmer and an Open Source enthusiast. I write about programming and technology on this blog.

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  1. […] Step by Step guide to installing ubuntu 16.04 LTS Upgrading Ubuntu 14.04 to 16.04 LTS. Troubleshooting Ubuntu 16.04 LTS Wi-Fi problems. […]

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