Return-path: Received: from mail-wg0-f44.google.com ([74.125.82.44]:37761 "EHLO mail-wg0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965826Ab2FBVes (ORCPT ); Sat, 2 Jun 2012 17:34:48 -0400 Received: by wgbdr13 with SMTP id dr13so2930595wgb.1 for ; Sat, 02 Jun 2012 14:34:47 -0700 (PDT) Message-ID: <4FCA86F5.3070801@gmail.com> (sfid-20120602_233453_372974_3A7E63DA) Date: Sat, 02 Jun 2012 23:34:45 +0200 From: kuba MIME-Version: 1.0 To: Mohammed Shafi , linux-wireless@vger.kernel.org Subject: Re: Slow wifi connection AR9287 with ath9k 3.x kernel References: <4F569512.4000109@gmail.com> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Sender: linux-wireless-owner@vger.kernel.org List-ID: W dniu 07.03.2012 06:37, Mohammed Shafi pisze: > On Wed, Mar 7, 2012 at 11:05 AM, Mohammed Shafi > wrote: >> On Wed, Mar 7, 2012 at 4:22 AM, kuba 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 >>> -- >>> To unsubscribe from this list: send the line "unsubscribe linux-wireless" in >>> the body of a message to majordomo@vger.kernel.org >>> More majordomo info at http://vger.kernel.org/majordomo-info.html >> >> >> -- >> thanks, >> shafi > > Hi, I didn't have access to my notebook for 3 months, so I can't anwser, sorry. I have tried kernel 3.3.4 and I can still reproduce this error. This issue occurs with all AP, even if my notebook stands close to AP (1-5 m). I've noticed that wireless card works better with 3.3.4 but there are times when connection slows down and looks like this: --- 192.168.1.1 ping statistics --- 35 packets transmitted, 26 received, 25% packet loss, time 34017ms rtt min/avg/max/mdev = 0.986/6194.909/9659.450/2844.281 ms, pipe 10 It's a ping to gateway, ping to random website looks even worse. Wireless-testing doesn't solve this problem. lspci -v 03:00.0 Network controller: Atheros Communications Inc. AR9287 Wireless Network Adapter (PCI-Express) (rev 01) Subsystem: Foxconn International, Inc. Device e034 Flags: bus master, fast devsel, latency 0, IRQ 17 Memory at b5100000 (64-bit, non-prefetchable) [size=64K] Capabilities: Kernel driver in use: ath9k I can provide more data, just tell me what should I paste here. Cheers, Kuba