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Wireless problem in Ubuntu 10.04

In howto on Apr 25, 2012 by theoryl Tagged: , , , ,

If your laptop is using an Intel wireless card when running Ubuntu 10.04, your connection might degrade over time. The bug description can be found here. It seems to affect 5100, 5300, 6100, 6300 series Intel cards. The implemented workaround is to temporarily disable the 802.11n mode. This is done by the file /etc/modprobe.d/intel-5300-iwlagn-disable11n.conf which contains a line:

options iwlagn 11n_disable50=1

It seems like after about 2 years, the permanent fix hasn’t arrived. If you are unhappy with this workaround, you can change the switch from 1 to 0. Then do:

sudo modprobe -r iwlagn
sudo modprobe iwlagn

You can check the wireless performance by comparing outputs from iwconfig before and after the change. If the Bit Rate increases, you can keep the setting; otherwise, you can change it back. Thanks to http://ubuntuforums.org/showthread.php?t=1592846

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