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I'm very very new to Linux. I downloaded and installed the new kernel, 4.8.4, and now my wifi just shows "enable networking" but doesn't connect to anything. I'm not sure what to do

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  • How did you do that?
    – pa4080
    Oct 24, 2016 at 20:13
  • Remove the unsupported kernel and wifi will start working again ;-) Questions about problems with unsupported kernels are off-topic.
    – Pilot6
    Oct 24, 2016 at 20:13
  • I typed into the command line what this guy said: yourownlinux.com/2016/10/… Oct 24, 2016 at 20:17
  • Did you blacklist acer-wmi after the kernel update?
    – negusp
    Oct 24, 2016 at 20:18
  • I'm sorry for being off topic. I really don't know how to get the wifi going again. There's just no list of networks available. My Broadcom is still installed Oct 24, 2016 at 20:19

1 Answer 1

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Installing unsupported kernel is generally not good idea (except you need some specific fix which is implemented there).

Now, to get your wifi working again, you should remove this new kernel. Open terminal and type:

sudo apt-get autoremove linux-image-4.8.4... #(press <kbd>tab</kbd> to autocomplete)

sudo apt-get autoremove linux-headers-4.8.4... #(press <kbd>tab</kbd> again)

and last but very very important

sudo update-grub

Now reboot, your old kernel will be back (if you haven't removed it meanwhile, in that case, you will need to download and install old kernel manually.)

EDIT

How to install older kernel: Download these files:

http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4.14-xenial/linux-headers-4.4.14-040414_4.4.14-040414.201606241434_all.deb http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4.14-xenial/linux-headers-4.4.14-040414-generic_4.4.14-040414.201606241434_amd64.deb http://kernel.ubuntu.com/~kernel-ppa/mainline/v4.4.14-xenial/linux-image-4.4.14-040414-generic_4.4.14-040414.201606241434_amd64.deb

and install them in order: headers - all, headers, image

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  • update-grub is not needed. It will be run automatically, unless OP installed a kernel without using deb packages. But then your whole answer is not relevant.
    – Pilot6
    Oct 24, 2016 at 21:02
  • I did remove my old kernel. How do I go about downloading the old one again? Oct 24, 2016 at 21:02
  • What is your operating system? Is it Ubuntu?
    – Pilot6
    Oct 24, 2016 at 21:03
  • At least I think I did. I'm really frustrated and really don't want to have to go back to windows. Oct 24, 2016 at 21:03
  • Yes it is. Ubuntu 16.05 LTS Oct 24, 2016 at 21:03

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