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Dante Ashton
Asked: 2011-04-28 15:00:58 +0800 CST

Why is my internet so slow with an Atheros wireless card?

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Since I upgraded from Ubuntu 10.10 to 11.04, my internet connection is as slow as hell. I have tested my other 10.10 machine and it is just as quick as the first one was.

What has happened? Why is the maximum download speed now 30kb/s instead of the 2.5mb/s I used to have?

11.04

2 Answers

  1. Best Answer

    I've found out the problem; it's some sort of problem with my wifi driver (ath9k) which was resolved with a simple command:

    sudo -s
echo "options ath9k nohwcrypt=1" > /etc/modprobe.d/ath9k.conf
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  2. I had the same issue, but only after upgrade to 11.10. Either way, neither echo "options ath9k nohwcrypt=1" > /etc/modprobe.d/ath9k.conf (s/9/5 if you're using ath5k) or disabling IPv6 (another solution floating around) helped.

    What did help was changing the encryption on the network from WEP to WPA2 (inspired by a forum post I can't find at the moment on a related issue where encryption slowed down a wireless connection). It's still not as speedy as some of my other computers, but a whole lot better than it was.

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