From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from uxs-bsd-240-042.unaxus.net ([195.191.240.42]:16392 "EHLO uxs-bsd-240-042.unaxus.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752430Ab0EaQYI (ORCPT ); Mon, 31 May 2010 12:24:08 -0400 Received: from i577a8134.versanet.de ([87.122.129.52]:41288 helo=[192.168.178.92]) by uxs-bsd-240-042.unaxus.net with esmtpsa (TLSv1:CAMELLIA256-SHA:256) (Exim 4.71 (FreeBSD)) (envelope-from ) id 1OJ5tc-000Nwo-1T for linux-wireless@vger.kernel.org; Mon, 31 May 2010 16:23:16 +0200 Message-ID: <4C03C652.3000608@openwebboard.org> Date: Mon, 31 May 2010 16:23:14 +0200 From: Janek Bevendorff MIME-Version: 1.0 To: linux-wireless@vger.kernel.org Subject: Strange behavior of DWA-547 Content-Type: text/plain; charset=UTF-8 Sender: linux-wireless-owner@vger.kernel.org List-ID: Hey guys! There's a strange problem with my brand-new DWA-547 PCI WLAN card. I use the driver ath9k for it (already tried Madwifi and ndiswrapper, both don't work for me at all). I'm on a Gentoo Linux with a 2.6.34 kernel and linux-headers package 2.6.33 (newest in Portage). I first used the built-in kernel module and now the bleeding edge ath9k driver from wireless.kernel.org but it brought no change. So what's the problem? The problem is that I have a very unsteady WLAN connection. iwconfig wlan2 (wlan2 is the device since it's not the first WLAN adapter I've used but all other drivers are unloaded) shows me bit rates from 1Mb/s up to 54Mb/s depending on... yes I actually don't know what it depends on. The actual data rate is between 0kB/s and 700kB/s, sometimes it has tips up to 1,3/MB/s for a second or so. But the average data rate is about 120-200kB/s or below. But that's very slow. I had another WLAN device which had a more stable connection. Sometimes I have a data rate of fantastic 700kB/s and then it suddenly goes down to 60kB/s. And of course one connection has a significantly different data rate than the previous connection. So when I connect with a good speed, then disconnect and reconnect it can be that I now have not even half of the speed I had before but I haven't changed the position of the antennas at all. Adjusting the antennas of course has an effect on the speed but not significantly. I can adjust them in a way that I get 0kB/s but anyway when I already have a very slow connection I can only advance the speed about 80-100kB/s, not more. I've googled a lot the last few days and found many similar problems with ath9k but none of them solved my problem. I use WICD as my network manager and most of the time it shows an orange bar for the connection quality (~45-50%), seldom a green bar but never 100%. Sometimes it even shows a red bar (<25%) whereas my old WLAN card always had a green bar and that with only one antenna (DWA-547 has three). Here's what lspci says about my WLAN card: 0c:02.0 Network controller: Atheros Communications Inc. AR922X Wireless Network Adapter (rev 01) I hope someone can help me. Thanks Janek