From: Volker Mische <volker.mische@gmail.com>
To: Emmanuel Grumbach <egrumbach@gmail.com>
Cc: linux-wireless <linux-wireless@vger.kernel.org>
Subject: Re: Problem with 40Mhz on 2.5GHz with Intel 8260
Date: Tue, 20 Sep 2016 08:22:54 +0200 [thread overview]
Message-ID: <e22cedce-354f-cd41-f89c-8167f7063cfb@gmail.com> (raw)
In-Reply-To: <CANUX_P1cFXTFk8c7iMZuVwoySMwVKPkLBOTr=sVC+t6xioPa=w@mail.gmail.com>
Hi,
On 09/20/2016 07:39 AM, Emmanuel Grumbach wrote:
> On Mon, Sep 19, 2016 at 5:00 PM, Volker Mische <volker.mische@gmail.com> wrote:
>> 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.
>
> Well... depends whom you ask and how much time you have :)
I really want to get this sorted out.
> We tried a few times to debug those, but they take a very long time to debug
> since typically we need lots of reproductions and the firmware team
> doesn't always
> the time to look at the data immediately so in the end, the people who
> reported this
> originally went away.
> Note that 40MHz on 2.4GHz is not an optimal configuration in crowded
> environment,
> but if you live in a place where you are pretty much the only one using those
> frequencies, then, it can be beneficial.
It's at home. I normally see only one other wifi (I need to check which
frequency that one is using).
> What you can try is to disable low power states (by using power_scheme
> in iwlmvm) and see if it helps.
I will try that.
> This setting has a bigger impact than cfg80211_disable_40mhz_24ghz
> but it can give a hint as where the problem is coming from.
I'll report back.
Should I open a bug report (or use an existing one) or should we keep
the discussion on the mailing list?
Cheers,
Volker
>> [1]:
>> https://wireless.wiki.kernel.org/en/users/drivers/iwlwifi#about_platform_noise
next prev parent reply other threads:[~2016-09-20 6:22 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-09-19 14:00 Problem with 40Mhz on 2.5GHz with Intel 8260 Volker Mische
2016-09-20 5:39 ` Emmanuel Grumbach
2016-09-20 6:22 ` Volker Mische [this message]
2016-09-20 15:50 ` Volker Mische
2016-09-21 6:54 ` Emmanuel Grumbach
2016-09-21 7:01 ` Volker Mische
2016-09-21 7:20 ` Emmanuel Grumbach
2016-09-21 20:19 ` Volker Mische
2016-09-22 5:32 ` Emmanuel Grumbach
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