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I have a Dell Inspiron 3543. To get its wifi working, I had to select "Use proprietary driver" and it used to work.

However, suddenly it has stopped using that driver. Whenever I select the driver and click on "Apply", it reverts back to "Do Not Use" and the status says "This device is not working"

I tried using a live boot CD and the WiFi works, but not on my installation. How do I fix it?

Dushyant Bangal
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  • Maybe a kernel update is responsible? Could you try an older kernel: http://askubuntu.com/questions/216398/set-older-kernel-as-default-grub-entry ? – DK Bose Mar 28 '16 at 06:27
  • @DavidFoerster, thanks but its been solved. i noticed even LAN wasn't working, found RESET and REVERT buttons in LAN settings. That fixed it. – Dushyant Bangal Apr 01 '16 at 05:21

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I connected LAN and even that wasnt working. So I went into its settings and clicked on reset and the LAN started working.

Then I tried "Use this driver" again and the stupid thing started working again. :)

Dushyant Bangal
  • 151