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Re: carl9170 driver - reducing the output power

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On Monday, June 25, 2012 12:38:50 PM Michal Kudelski wrote:
> Thus, my question is: is the function of changing the 
> txpower really supported? If it is, what steps should I 
> take to make it work? I tried with ifconfig up/down when I 
> change the txpower, but it does not change anything. Maybe 
> I do something wrong? Do I use the correct versions of the 
> firmware and the driver?
No special firmware or driver is required. Just as long
as the driver supports the feature.  

> I've noticed a patch related to this issue, published on 
> 2012-01-27 by Christian Lamparter. It seems that it is 
> included in my driver version, but maybe I'm wrong and I 
> should apply some additional patch?
> 
> We use NetGear WNDA3100(v1) hardware [Atheros 
> AR9001U-(2)NG] and carl9170 driver 
> (driverversion=3.0.0-21-generic firmware=1.9.2).
That's probably too old. The patch you are talking about
is not a -stable patch so it's not backported to 3.3.x
(or older) kernels.

So, either you can upgrade to 3.4, use compat-wireless
<http://linuxwireless.org/en/users/Download/#Getting_compat-wireless_on_Ubuntu>
or backport the patch yourself (however, this could be diffcult).

Regards,
	Christian
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