Message-ID: <5180F0C0.3070002@arubanetworks.com> (sfid-20130501_123915_275506_68143172)
Date: Wed, 1 May 2013 12:38:56 +0200
From: Shawn Adams <sadams@arubanetworks.com>
MIME-Version: 1.0
To: <linux-wireless@vger.kernel.org>
Subject: iwlwifi no HT function - is_lq_table_valid
Content-Type: text/plain; charset="ISO-8859-1"
Sender: linux-wireless-owner@vger.kernel.org

Hello,

I'm new to the list, and have one question, apologies if this not
appropriate for this list.


I have recently updated a Lenovo T410s to opensuse 12.3, and noted that the
PC will no longer connect HT to anything.

It connects fine at both 802.11a and 802.11g, but never with HT.

throughout is ~30Mbps,  both AP and card list the connection at 54Mbps


This worked before the update from opensuse 12.2 and the older
kernel/iwlwifi driver, using
5Ghz HT at throughput at 90Mbps


I see these messages in the debug, regardless of which band or channel
is used:


2013-04-30T21:33:02.853629+02:00 lamda kernel: [ 6355.226711] iwlwifi
0000:03:00.0: I is_lq_table_valid Channel 48 is not an HT channel


This event occurs in 802.11g and 802.11a bands, and on a variety of APs,
channels.

At the same moment a number of different clients are happily using HT on
the same channel and AP.


I read through some of the related patch, but not being a coder, was not
able to answer tihs question:

What is the driver detecting that tells it this is not an HT channel ?


hints very much appreciated.

Best regards,


Background info:

Linux lamda 3.7.10-1.1-default #1 SMP Thu Feb 28 15:06:29 UTC 2013
(82d3f21) i686 i686 i386 GNU/Linux


03:00.0 Network controller: Intel Corporation Centrino Advanced-N 6200
(rev 35)
    Subsystem: Intel Corporation Centrino Advanced-N 6200 2x2 AGN
    Flags: bus master, fast devsel, latency 0, IRQ 44
    Memory at f2400000 (64-bit, non-prefetchable) [size=8K]
    Capabilities: [c8] Power Management version 3
    Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
    Capabilities: [e0] Express Endpoint, MSI 00
    Capabilities: [100] Advanced Error Reporting
    Capabilities: [140] Device Serial Number 58-94-6b-ff-ff-57-31-cc
    Kernel driver in use: iwlwifi


Connected to d8:c7:c8:9e:dd:09 (on wlan0)
    SSID: priv_cert
    freq: 5240
    RX: 13154608 bytes (28155 packets)
    TX: 1411780 bytes (6962 packets)
    signal: -57 dBm
    tx bitrate: 54.0 MBit/s

    bss flags:    short-slot-time
    dtim period:    0
    beacon int:    100


-- 

Shawn Adams