Fix low wifi speed on Linux (Ubuntu) with chip Atheros AR9285

by Álex 2011-07-03 13:07 linux lowspeed linux atheros wifi ath9k ubuntu ar9285

I was very happer after buy my new computer Dell Vostro v130, but after install Linux on it I’ve realized that the download speed via WiFi was very slow! To solve this I found two “solutions”, one of them works, but the other not (for me).

The solutions that didn’t work is more easy, so I will start with it, you must install linux-backports-modules-net-natty-generic, you can do it via synaptic, ubuntu software center, aptitude, apt… I show you a screenshot doing it with ubuntu software center:


The second “solution” is deactivate the hardware cryptography of the module, I don’t know if this could cause security problems or instead use hardware it will use software crypt, anyway, it is the best solutions that I find until the moment.

To do that, you must create the file /etc/modprobe.d/ath9k.conf with the content: options ath9k nohwcrypt=1, you can do it easily with:

echo "options ath9k nohwcrypt=1" > /etc/modprobe.d/ath9k.conf

If you have any questions, or you find a better solution, please, let me know.


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