[Bug 348204] Re: [Jaunty] Intel wireless 3945ABG is unstable and disconnects frequently

[Wadelius]

I was finally able to fix this

I've had this problem for a long time and have tried a lot of fixes, none of them have worked. I finally gave up and ordered a new network card with another chip. It has not arrived yet, so naturally I find a solution that works when trying to take care of another problem :-). In my case the cause of the connection dropping was tcp window scaling. I found it here:
http://wheel.troxo.com/2008/06/05/tcp-window-scaling-conundrum/
and here:
http://www.youtube.com/watch?v=N_AzSOJbKlI

Some network cards have problems with tcp window scaling, which means
changing the size of the packets on demand. You can either change the
max min boundaries of the packets, or disable scaling altogether. What
worked for me was disabling it.

To disables tcp window scaling you need to add the line below to your /etc/sysctl.conf.
net.ipv4.tcp_window_scaling=0

To reset run
sudo sysctl -p

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[Jaunty] Intel wireless 3945ABG is unstable and disconnects frequently
https://bugs.launchpad.net/bugs/348204
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