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I am writing this post out of desperation. I have been trying to make my wifi run on a freshly installed Ubuntu 15.10 for the past 3 days. Nothing helped. I literally tried anything on the internet that there was, I tried installing backports and new firmware, I tried installing different drivers, I tried installing bcmwl-kernel-source an so forth and so on... Nothing worked.. Only once after I installed new backports and rebooted the wifi magically worked and I was able to connect to the internet and even download updates and stuff but after reboot same story. I can't see the "enable wifi" button in network manager and I can't see any networks whatsoever. My machine is lenovo yoga 3 14 and my wireless card is qalcomm atheros qca6147. Also, when I run rfkill list, I get ideapad_laptop wlan, which is neither soft blocked nor hard blocked. Is there currently any solution to this problem ? If anyone can help me I will be very thankful!!!

P.S. I installed Ubuntu 15.10 dual boot alongside windows 10.

ridiculous1995
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2 Answers2

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Please download this file to your desktop: https://www.kernel.org/pub/linux/kernel/projects/backports/stable/v4.3/backports-4.3-1.tar.gz Right-click it and select 'Extract Here.' Now, in the terminal:

cd ~/Desktop/backports-4.3.1
make defconfig-ath10k
make
sudo make install

You will have built the driver for your current kernel version only. When Update Manager installs a later kernel version, also known as linux-image, after the requested reboot, re-compile:

cd ~/Desktop/backports-4.3.1
make clean
make defconfig-ath10k
make
sudo make install

Please retain the files and these instructions for that time.

This device also requires firmware. Please download this package to your desktop: http://archive.ubuntu.com/ubuntu/pool/main/l/linux-firmware/linux-firmware_1.149.3_all.deb

Now, back to the terminal:

cd ~/Desktop
sudo dpkg -i linux*.deb

Reboot and your wireless should be working.

Let's try a driver parameter. From the terminal:

sudo -i
echo "options ath10k_core skip_otp=y" > /etc/modprobe.d/ath10k.conf
exit

Let's also remove bcmwl-kernel-source:

sudo apt-get purge bcmwl-kernel-source

Reboot and tell us if there is any improvement.

In your paste, we see this:

[ 2.295514] ath10k_pci 0000:02:00.0: Direct firmware load for ath10k/QCA6174/hw2.1/board-pci-168c:0041:17aa:3545.bin failed with error -2 [ 2.295521] ath10k_pci 0000:02:00.0: failed to load spec board file, falling back to generic: -2 [ 3.479967] ath10k_pci 0000:02:00.0: firmware crashed! (uuid c3a5f1c6-425d-45ac-94df-2d6f6096c816)

Let's try a different and, perhaps newer firmware file. In a terminal:

sudo apt-get update
sudo apt-get install git
git clone https://github.com/kvalo/ath10k-firmware.git
cd ath10k-firmware/QCA6174/hw2.1
sudo cp *  /lib/firmware/QCA6174/hw2.1
cd /lib/firmware/ath10k/QCA6174/hw2.1
sudo mv firmware-5.bin_SW_RM.1.1.1-00157-QCARMSWPZ-1  firmware-5.bin

Reboot and tell us if it is working now. If not, give us a new paste:

dmesg | grep ath
chili555
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I think the issue is the firmware as your pastes show firmware revision numbers from kvalo's github 

cd /lib/firmware/ath10k/QCA9174/hw2.1
sudo rm firmware-5.bin
sudo rm board.bin
sudo wget https://github.com/atondwal/ath10k-firmware/blob/master/ath10k/QCA6164/hw2.1/firmware-5.bin?raw=true
sudo mv firmware-5bin?raw=true firmware-5.bin
sudo wget https://github.com/atondwal/ath10k-firmware/blob/master/ath10k/QCA6164/hw2.1/board.bin?raw=true
sudo mv board.bin?raw=tru board.bin

Reboot, if it doesn't work post the paste.ubuntu.com link for dmesg | grep ath; lshw -c net

Jeremy31
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