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I have strange Wi-Fi problem. All my devices were properly fine but suddenly only Ubuntu installed laptops has stopped to connect our wifi. One laptop is totally outdated, never upgraded, Ubuntu 11.xx. The other one is always updated. And none of them can't establish the wifi connection. But outdated Ubuntu installed laptop has dual boot with win 7 and win 7 can establish the connection.

Here is output of wireless_script.sh from updated laptop: http://paste.ubuntu.com/10683087/

Any suggestions?

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  • Can you try (as super-user) modprobe -r iwlwifi && modprobe iwlwifi 11n_disable=1 (source))? What's the command output and can you connect afterwards?
    – David Foerster
    Commented Mar 26, 2015 at 12:25
  • I did try but it didnt work @DavidFoerster paste.ubuntu.com/10683524
    – desperado
    Commented Mar 26, 2015 at 12:36
  • Did the command, I supplied, work? What are the current module parameters of iwlwifi? Is 11n_disable set to 1 (check with modinfo iwlwifi)?
    – David Foerster
    Commented Mar 26, 2015 at 12:45
  • Yes @DavidFoerster, i did the command and the output was above. Other output is: paste.ubuntu.com/10683587
    – desperado
    Commented Mar 26, 2015 at 12:55
  • Ok, thanks. That sounded like it was worth a try.
    – David Foerster
    Commented Mar 26, 2015 at 15:46

2 Answers 2

Reset to default
1

add this option in kernel drivers settings

echo options iwlwifi 11n_disable=1 | tee -a /etc/modprobe.d/iwlwifi.conf

Then restart the system this must fix wifi problem.

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  • 1
    I fixed your command. sudo echo ... >> /etc/... doesn't work like that.
    – David Foerster
    Commented Mar 26, 2015 at 12:12
  • This solution doesn't help though, as one can infer from the back and forth between OP and me in the comments to the question.
    – David Foerster
    Commented Mar 26, 2015 at 15:47
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Solved. I changed the modem with same model and everything is fine.

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