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Date: Wed, 7 Mar 2012 11:07:34 +0530
Message-ID: <CAD2nsn1RZVkv3r7JredsLhuSL_+FAObugyryuThhdaA4ihtFnw@mail.gmail.com> (sfid-20120307_063738_359571_22CA41C3)
Subject: Re: Slow wifi connection AR9287 with ath9k 3.x kernel
From: Mohammed Shafi <shafi.wireless@gmail.com>
To: kuba <kuba.g4@gmail.com>
Cc: linux-wireless@vger.kernel.org
Content-Type: text/plain; charset=ISO-8859-1
Sender: linux-wireless-owner@vger.kernel.org

On Wed, Mar 7, 2012 at 11:05 AM, Mohammed Shafi
<shafi.wireless@gmail.com> wrote:
> On Wed, Mar 7, 2012 at 4:22 AM, kuba <kuba.g4@gmail.com> wrote:
>> Hello,
>
> hi,
>
>>
>> I have submitted bug on Kernel bug tracker and provide info, but it seems
>> that no one there is interested in this topic. I discovered that since
>> 2.6.38 kernel version there is bug in ath9k driver (using AR9287 chipset).
>> I've posted some additional info at this adress:
>> https://bugzilla.kernel.org/show_bug.cgi?id=42352
>
> please provide as much info as possible, in which mode you are
> operating, how noisy is the environment, distance between STA and AP.
> anything specific etc.
> i just tried ?compat-wireless-2012-02-04, distance between STA and AP
> at least 5ms, a bit of noisy environment, channel 6 HT40 plus, AES
> ping RTT is good only. i ?may be missing something
>
>
>>
>> The last working version is 2.6.37.6.
>
> if we are very clear about the working one and non-working doing the
> following things will make our work very easier
> lets say 2.6.37.6 is working fine and 2.6.38 is broken for you
>
> we can work with our wireless-testing tree kernel
> git clone git://git.kernel.org/pub/scm/linux/kernel/git/linville/wireless-testing.git
>
> then please do git tag
>
> *git log --pretty=oneline v2.6.37-rc6..v2.6.38 | grep AR9287
> 07422063d43612762d53fac8b6df213c96f4b1f6 ath9k_hw: Fix calibration for
> AR9287 devices
> f7ec8fb4d6f8f3ecb8b11e9e46ece95aa66139cc ath9k_hw: Fix eeprom offset
> for AR9287 devices (PCI/USB)
>
> *even with 3.3-rc5 we got less commits
>
> 6321eb0977b011ac61dfca36e7c69b2c4325b104 ath9k_hw: Fix number of GPIO
> pins for AR9287/9300
> a7be039d347743c289b7280d5de82abf7bbdf1d8 ath9k: Fix eifs/usec timeout
> for AR9287 v1.3+
> 49c99520f3b15300156830904f9ffcf51cb1160e ath9k_hw: Add dump_eeprom
> support for AR9287
> 087b6ff682ff62c49c9a36ddfd24fc781367b1d1 ath9k_hw: fix MAC clock rate
> for AR9287 v1.3+
> 1df85ecec36ad5da3f0165760704310d6c03f65f ath9k: Fix AR9287 calibration
> 2d05a0c2b4ac614cb5e0eba75d39a37205d129e8 ath9k_hw: Remove unused code
> in AR9287 eeprom
> 81544026e4cecb85a8b727d5f64cb3c8a8cb64a3 ath9k_hw: Fix throughput
> drops in HT40 mode for AR9287 chips
> 6d64ab7f9240e3201fde3fd16ce4227bd795d2ab ath9k_htc: Fix LED pin for
> AR9287 HTC device
> 07422063d43612762d53fac8b6df213c96f4b1f6 ath9k_hw: Fix calibration for
> AR9287 devices
> f7ec8fb4d6f8f3ecb8b11e9e46ece95aa66139cc ath9k_hw: Fix eeprom offset
> for AR9287 devices (PCI/USB)
>
>
> *git log --pretty=oneline v2.6.37-rc6..v2.6.38 | grep ath9k_hw
>
> *git log --pretty=oneline v2.6.37-rc6..v2.6.38 | grep ath9k
>
>

please do try with the latest wireless-testing tree if you can get the
same problem, also please try to check if this issue occurs with some
other AP too.

>
>> I can provide more data if anyone is interested.
>> Cheers,
>> Kuba
>> --
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>
>
>
> --
> thanks,
> shafi


-- 
thanks,
shafi