To: linux-wireless@vger.kernel.org
From: Benedikt Schwarz <beweta@gmx.com>
Subject: Re: iwlwifi: Upload rate is ten times faster on Windows
Date: Tue, 28 Jan 2014 20:05:38 +0100
Message-ID: <52E7FF82.3040400@gmx.com> (sfid-20140128_200554_439370_E1314003)
References: <lc31d9$sma$1@ger.gmane.org> <52E5A0AE.7000009@erley.org>
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Hi Pat,

Am 27.01.2014 00:56, schrieb Pat Erley:
> On 01/26/2014 07:09 AM, Benedikt Schwarz wrote:
>> Hi,
>>
>> the upload rate of my Intel Centrino Wireless-N 100 BGN (REV=0x6C) with
>> firmware version 39.31.5.1 build 32895 is about ten times faster on
>> Windows 7 (~ 4500 KB/s) than on Linux (~ 500 KB/s) when uploading files
>> to my NAS device. I'm running Kubuntu 13.10 with kernel
>> 3.12.0-031200-generic.
>>
>> What could be the reason for this problem?
> 
> Some questions which will greatly help in getting this resolved:
> 
> How are you connecting to the NAS?  Samba/Cifs?  NFS?  FTP?

A Samba/CIFS connection.


> How are you measuring your bandwidth?

I use bandwidth monitors.


> Check /etc/modprobe.d/* for a line that has something like:
> 
> iwlwifi 11n_disable=1

I haven't found a line like this in any of these files in /etc/modprobe.d/


> A lot of distributions have that on by default as there have been issues
> with the iwlwifi driver using 802.11n.
> 
> Are you connecting to an open or wpa1+tkip access point?  Try using
> wpa2+ccmp instead.  This is required for 802.11n to work.  Windows may
> not be enforcing that portion of the standard.

I already use WPA2.


Regards,
Benedikt Schwarz