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sds
Asked: 2015-04-26 22:53:28 +0800 CST

No WiFi on a system76 laptop after upgrade to 15.04

  • 772

I just upgraded System76 Gazelle laptop to 15.04 and wifi no longer works.

It sees many networks and tries to connect to mine, but fails repeatedly (/var/log/syslog seems to indicate authentication failure, but the password in the /etc/NetworkManager/.../my-wifi is, of course, correct).

I tried rebooting both the laptop and the wireless modem.

I also tried Fn-F11 (which now turns on "airplane mode") with no results.

I also tried wired internet which is also ignored.

How do I restore the WiFi?

PS. Also http://ubuntuforums.org/showthread.php?t=2275442

networking

3 Answers

  1. Best Answer

    Found an answer:

    sudo mv /lib/firmware/iwlwifi-3160-12.ucode /lib/firmware/backup-iwlwifi-3160-12.ucode
sudo mv /lib/firmware/iwlwifi-3160-10.ucode /lib/firmware/backup-iwlwifi-3160-10.ucode

    Reboot. Seems to be an issue with the firmware. After reboot I was able to connect again, so for me it is working.

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  2. I noticed that when I upgraded, I too had no wi-fi on both my laptops. What I had manually connect to my internet connection again. After that it was all OK, but if I had not of done it the first tiem, I would not of got back on to the net.

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  3. The problem that I am seeing is that with the 15.04 upgrade and all of these fixes, I can get the laptop to connect to an NG-mixed station but not to an N-only station. All of my wireless AP's were set to N-only, and I have had to revert them to NG-mixed to get the connection.

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