Disconnected you are now offline

Question

Every time i login this message appears i cant connect to internet on ubuntu.I tried disabling and reenabling network manager but it didnt worked.

03:00.0 Network controller [0280]: Intel Corporation Centarino Wireless-N 1000 [ Condor Peak] [8086:0083]
 Subsystem: Intel Corporation Centario Wireless-N1000 BGN [8086:1325]

Solution

It looks like the iwlwifi kernel module is not loaded.

Connect to internet an alternative way and run in terminal:

sudo apt-get install linux-generic-lts-utopic

and reboot.

If you can't connect to internet an alternative way, then download these files:

http://mirrors.kernel.org/ubuntu/pool/main/l/linux-lts-utopic/linux-image-3.16.0-51-generic_3.16.0-51.69~14.04.1_i386.deb
http://security.ubuntu.com/ubuntu/pool/main/l/linux-lts-utopic/linux-image-extra-3.16.0-51-generic_3.16.0-51.69~14.04.1_i386.deb
http://security.ubuntu.com/ubuntu/pool/main/l/linux-meta-lts-utopic/linux-headers-generic-lts-utopic_3.16.0.51.42_i386.deb

Copy them to your Ubuntu Home folder and run in terminal

sudo dpkg -i linux*.deb

Reboot.

If your wifi starts working, run:

sudo apt-get update
sudo apt-get install linux-generic-lts-utopic
sudo apt-get upgrade

You will have the kernel updated. If the wireless still does not work, run:

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

and reboot again.

Comments

[user5441403]

@DavidCole can u please explain how should i describe you my problem. please i havent use ubuntu before.I am worried because i need to complete my assignments and i am not getting any solution :(

[Pilot6]

How do you connect to internet?

[user5441403]

@Pilot6 i have windows 7 installed too along with ubuntu and i often use wifi on my mobile but i cant connect on ubuntu.As soon as i login into my Ubuntu it says "Disconnected You Are Now Offline" please give me possible solution :(

[user5441403]

03:00.0 Network controller [0280]: Intel Corporation Centarino Wireless-N 1000 [ Condor Peak] [8086:0083] Subsystem: Intel Corporation Centario Wireless-N1000 BGN [8086:1325] 04:00.0 Ethernet Controller [0200]: Qualcomm Atheros AR8152 v1.1 Fast Ethernet [1969:2060] (rev c1)

[user5441403]

@Pilot6 03:00.0 Network controller [0280]: Intel Corporation Centarino Wireless-N 1000 [ Condor Peak] [8086:0083] Subsystem: Intel Corporation Centario Wireless-N1000 BGN [8086:1325] 04:00.0 Ethernet Controller [0200]: Qualcomm Atheros AR8152 v1.1 Fast Ethernet [1969:2060] (rev c1)

[Pilot6]

What is the Ubuntu version? And what is the output of uname -r?

[user5441403]

@Pilot6 its not working bro and output of uname -r is 3.16.0-45-generic

[user5441403]

@Pilot6 i am using ubuntu 14.04LTS

[Pilot6]

Can you connect to internet by wire?

[Pilot6]

And also please add this output TO YOUR QUESTION grep iwlwifi /etc/modprobe.d/*

[user5441403]

@Pilot6 no as i am using wifi data card its a dongle that comes with wifi

[Pilot6]

So you can connect to internet using the dongle?

[user5441403]

@Pilot6 no i cant i am typing all the outputs:( and that grep command which u said right now didnt gave any output :(

[user5441403]

@Pilot6 no output came from this command :( m worried please help pilot

[Pilot6]

Is your system 32-bit or 64-bit? uname -i?

[user5441403]

@Pilot6 its 32 bit and output is i686

[Pilot6]

See the updated answer.

[user5441403]

@Pilot6 my net is working now thanks but that three commands which you mentioned are not working

[Pilot6]

What do you mean "not working"? And if you problem is solved. accept the answer by clicking the check sign at the left.

[user5441403]

@Pilot6 bro that three command are still not working and i cant update any apps it says package of system is broken

[Pilot6]

Please ask another question regarding the other issue.

[user5441403]

@Pilot6 pilot so nice of u bro thanks a lot thanks

[pedram shabani]

security.ubuntu.com/ubuntu/pool/main/l/linux-meta-lts-utopic‌​/… dosen't work!!!!!