The Problem

  • My WiFi network disconnects itself randomly and start asking for password.
  • The password is already stored,I just have to click on connect.
  • When I click on connect ,it remains connected for some time then again disconnects and sometimes it even does not connects.
  • The speed while being connected is very low and torrents are not downloading.
  • When sometimes I connect to WiFi I got System encountered a error dialogue box

What did I do

  • I go to Edit connections and make sure that All users can connect is ticked.

  • I also deleted config file of connection from /etc/NetworkManager/system-conncections

Still I can't connect to WiFi sometimes and it disconnects automatically if get connected after some time. So what should I do?

After googling I found that this problem has been encountered in earlier versions , I am using Ubuntu 16.04 so if there is a permanent solution which can help everyone that will be the best.

P.S.- I have already tried these links My wireless/WiFi connection does not work. What information is needed to diagnose the issue? , WiFi repeatedly asks for password (Ubuntu 12.10 fresh) and http://www.askubuntu.com/questions/285287/wifi-keeps-asking-for-password-ubuntu-12-10 . Also the WiFi network works fine with my mobile.If more information is needed than let me know and how I can find it.

Also after seeing this I have a hardware detection problem, what logs do I need to look into? i found that no card was soft or hard blocked and rest info I found after using commands are on http://paste.ubuntu.com/19615988/

Output of lspci -knn | grep Net -A2

02:00.0 Network controller [0280]: Intel Corporation Centrino Wireless-N 130 [8086:0896] (rev 34)
Subsystem: Intel Corporation Centrino Wireless-N 130 BGN [8086:5005] Kernel driver in use: iwlwifi

New Update: I can't to my WiFi network, I have to use USB tethering in mobile to use internet on my laptop.

  • Please edit your question and add output of lspci -knn | grep Net -A2 terminal command. – Pilot6 Jul 16 '16 at 11:35
  • 1
    Run sudo tee /etc/modprobe.d/iwlwifi-opt.conf <<< "options iwlwifi 11n_disable=1", reboot and test again. – Pilot6 Jul 18 '16 at 11:45
  • @Pilot6 thanks it worked. Can you write a answer so that I can accept it and it will also help others and please mention what does this command did? – bha159 Jul 18 '16 at 11:52
  • There are a few adapters that do not support this protocol. This solution is applicable to all of them. I could not find an wxact duplicate, so I wrote an answer. – Pilot6 Jul 18 '16 at 11:55

These adapters do not support 802.11n protocol well (at least on linux), but iwlwifi driver tries to use it. You can disable this protocol by running in terminal

sudo tee /etc/modprobe.d/iwlwifi-opt.conf <<< "options iwlwifi 11n_disable=1"

This will be applied after a reboot.

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