To: linux-wireless@vger.kernel.org
From: Volker Mische <volker.mische@gmail.com>
Subject: Problem with 40Mhz on 2.5GHz with Intel 8260
Message-ID: <24d0d9c5-7695-9364-c5fa-97e9d52712dc@gmail.com> (sfid-20160919_160106_911094_1F64C431)
Date: Mon, 19 Sep 2016 16:00:55 +0200
MIME-Version: 1.0
Content-Type: text/plain; charset=utf-8
Sender: linux-wireless-owner@vger.kernel.org

Hi,

I'm having connectivity issues with an Intel 8260 on a 2.5GHz network
when using 40Mhz. I'm getting errors like

    Queue 2 stuck for 10000 ms.

I've upgrade my system to the firmware version 21 (21.373438.0) and
Kernel 4.8.0-rc6 in hope that it fixes the issue and to be able to debug
the problem.

I then found the page about platform noise [1]. I don't have any issue
for several hours now (normally I was hitting the issue every few
minutes) as I've set the cfg80211_disable_40mhz_24ghz parameter.

Now I wonder, is it worth debugging the issue with being on 40MHz or is
disabling the proper solution and I should bother.

[1]:
https://wireless.wiki.kernel.org/en/users/drivers/iwlwifi#about_platform_noise

Cheers,
  Volker