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: ath9k: Regression in 2.6.38 (30% package losses, ~20KBit/s throughput) with AR9285
Date: Mon, 25 Apr 2011 14:51:39 +0200 [thread overview]
Message-ID: <4DB56E5B.4090101@hauke-m.de> (raw)
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
next reply other threads:[~2011-04-25 12:51 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2011-04-25 12:51 Hauke Mehrtens [this message]
2011-04-25 13:05 ` ath9k: Regression in 2.6.38 (30% package losses, ~20KBit/s throughput) with AR9285 Hauke Mehrtens
2011-04-25 17:07 ` John W. Linville
2011-04-25 17:38 ` [stable] " Greg KH
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