Connection 802.1x supplicant failed

Question

Before everything was working ok, but now I keep getting

802.1x supplicant failed

And no connection to network. I can reset it with

sudo service network-manager restart

But I was wondering if there is a way to fix this problem permanently so that it doesn't happen any more.

Answer 1

It might be because you installed some other network manager like wicd along with gnome-network-manager as this exactly was the problem in my case now assuming the same here is what I suggest:

1. Install NetworkManager:

   sudo apt-get install network-manager-gnome network-manager
   

2. Then remove WICD:

   sudo apt-get autoremove wicd wicd-gtk
   

3. Restart your system.

4. Confirm everything is working, then remove WICD config files:

   sudo dpkg --purge wicd wicd-gtk
   

Answer 2

I had to install WICD because I haven't found the permanent solution for my Linux Mint 18.1 WiFi problem, even though I've made all the updates and every try suggested... so just using WICD or do:

sudo service network-manager restart

Answer 3

I confirm that in Ubuntu 17.10 with kernel 4.13.0-45-generic and Gnome 3.26.2 I had the same problem after wicd installation. After the PC went to sleep the Wi-Fi did not restore it's state when resuming. So, I removed wicd.

There still must be some config to use wicd without this "...supplicant failed" error occuring.

Answer 4

I had the same problem and the issue got resolved by running the command below:

sudo service network-manager restart

Try these commands if the above did not work:

sudo service network-manager stop
sudo service network-manager start
reboot