From: Hauke Mehrtens <hauke@hauke-m.de>
To: Felix Fietkau <nbd@openwrt.org>,
"Luis R. Rodriguez" <lrodriguez@atheros.com>,
Vasanthakumar Thiagarajan <vasanth@atheros.com>,
Senthil Balasubramanian <senthilkumar@atheros.com>,
Jouni Malinen <jmalinen@atheros.com>
Cc: ath9k-devel@lists.ath9k.org,
"linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>
Subject: Re: ath9k: Regression in 2.6.38 (30% package losses, ~20KBit/s throughput) with AR9285
Date: Mon, 25 Apr 2011 15:05:04 +0200 [thread overview]
Message-ID: <4DB57180.40208@hauke-m.de> (raw)
In-Reply-To: <4DB56E5B.4090101@hauke-m.de>
On 04/25/2011 02:51 PM, Hauke Mehrtens wrote:
> Hi,
>
> with kernel 2.6.38 the wifi connection with my Atheros AR9285 is
> unusable when the distance from the AP is more that 3 meters. (30%
> package losses, ~20K/s throughput compared to ~3M/s) Tested with two
> cards on different devices. With kernel 2.6.35 or kernel 2.6.38 +
> compat-wireless 15 meters distance is no problem. The problem only
> occurs in 2.6.38-rc1 to 2.6.38.4 but not in any more recent versions. I
> did a git bisect and found the commit fixing the problem.
>
> commit 115dad7a7f42e68840392767323ceb9306dbdb36
> Author: Felix Fietkau <nbd@openwrt.org>
> Date: Fri Jan 14 00:06:27 2011 +0100
>
> ath9k_hw: partially revert "fix dma descriptor rx error bit parsing"
>
> http://www.spinics.net/lists/linux-wireless/msg62742.html
>
> Please send this commit to the stable series for 2.6.38.
>
> The problem is also described at the Ubuntu launchpad:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/735431
>
> Hauke
I linked to a wrong Ubuntu Launchpad bug report. This is a correct one,
but there many many:
https://bugs.launchpad.net/archlinux/+source/linux/+bug/735171
Here is also a description in the kernel bugzilla:
https://bugzilla.kernel.org/show_bug.cgi?id=31452
Hauke
next prev parent reply other threads:[~2011-04-25 13:05 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-25 12:51 ath9k: Regression in 2.6.38 (30% package losses, ~20KBit/s throughput) with AR9285 Hauke Mehrtens
2011-04-25 13:05 ` Hauke Mehrtens [this message]
2011-04-25 17:07 ` John W. Linville
2011-04-25 17:38 ` [stable] " Greg KH
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