Ubuntu: How to resolve wireless disconnect problem in Atheros ath9k


I have a non stopped problem in my Acer Aspire 5733 model using Atheros ath9k driver. WiFi is working when router is in nearby location, there is nothing updates by Acer for Linux. I also using rfkill list all command to check switches, it shows:

Soft blocked: no  Hard blocked: no  

I searched everywhere on Ubuntu forum but didn't find any result for Aspire 5733, also I couldn't found any firmware for Atheros like Broadcom. This is a big disadvantage of Acer with Ubuntu. Also, I do some stuff to resolve this problem is to create a file named ath9k.conf:


with the contents:

options ath9k nohwcrypt=1  

Please suggest me optimal solution for this problem.


Beside creating a file named /etc/modprobe.d/ath9k.conf with the contents options ath9k nohwcrypt=1, I also had to disable acer_wmi kernel module:

sudo nano /etc/modprobe.d/blacklist.conf  

and add this line:

blacklist acer-wmi  

Then reboot. This fixed WiFi problems for me.


I had problems with the Atheros ath9k driver when I upgraded my kernel to fix some power management issues.

Tried the ath9k.conf file but it did not work.

Then I downloaded a driver and it solved my WiFi problems. This was what I did:

Go to wireless.kernel.org and download the appropiate driver for your kernel.

Check kernel version in terminal: uname -a

Unpack the file you just downloaded in a new folder into your downloads folder.
(it should be something like Downloads/compat-wireless-3.5.4-1-snp)
(beware: your filename might be different)

You will probably need the build tools; open a terminal and type:

sudo apt-get install build-essential linux-headers-generic  

Then after you have installed build-essential and headers, please do:

cd Downloads/compat-wireless-3.5.4-1-snp  sudo su  make  make install  modprobe -r ath9k  modprobe ath9k  exit  

My computer crashed shortly after the 2nd modprobe, but when I restarted everything ran lightspeed.

I'm running on an Aspire 5750Z. Hope it helps.


I know it's bit old question, but this solution bellow may help other people stuck with ath9k driver on Acer laptops.

Try to compile ath9k driver following this procedure on Ubuntu Forums


sudo apt-get install linux-headers-generic build-essential  

Download this to your desktop backports-3.12.2-1.tar.bz2

Compile using bellow comands

cd ~/Desktop/backports-3.12.2-1/  make defconfig-ath9k  make  sudo make install  sudo modprobe -r ath9k && sudo modprobe ath9k  

Your wireless should be working now. Note this will work until next kernel update. After kernel update you will need to recompile the driver again. Command are similar to ones above.

cd ~/Desktop/backports-3.12.2-1/  make clean  make defconfig-ath9k  make  sudo make install  sudo modprobe -r ath9k && sudo modprobe ath9k  


Try changing the "WPA group rekey interval" on your wifi router.. this is working for me now.. it was set to 2 before I changed it to 3600. This value is in seconds.. This is working for me now,I tried disabling hardware encryption and power mangagement, but that did not work..

I am now trying other combinations..by enabling power mangement and hardware encryption on again and by lowering the interval time to 60 seconds.. as these are desirable for security :)


Well It is certainly not a optimal solution but a workaround, but what works for me is to request dhcp in a loop i.e.

watch -n5 sudo dhclient -v wlan0  

Then I have intermittent connection via wireless router. I am using Hp ProBook 4540s and Linksys WRT 54GL


You can give a try to ndiswrapper, it allows you to run windows drivers in linux. Check out previously asked question here Need a few reboots to connect to wireless

Note:If u also have question or solution just comment us below or mail us on toontricks1994@gmail.com
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