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Resolving Slow Wifi Issue With Centrino N 1030 BGN in Ubuntu 12.04 LTS


I’ve bumped into issue with Intel Centrino Wireless-N 1030 BGN WiFi adapter under Ubuntu Linux 12.04 LTS. It works extremely slow with some WiFi AP.

How to fix

After some investigation I clarify that you need to switch off 802.11n for Centrino Wireless-B 1030 BGN WiFi adapter, then adapter will work good with all AP. I think that some of AP realize 802.11n protocol in not correct way, And this confuses Centrino WiFi adapter.

Switch off 802.11n

sudo rmmod iwlwifi
sudo modprobe iwlwifi 11n_disable=1

Switch on 802.11n

sudo rmmod iwlwifi
sudo modprobe iwlwifi 11n_disable=0

Permanently switch off 802.11n

emacs /etc/modprobe.d/iwlwifi-disable11n.conf
options iwlwifi 11n_disable=1

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