Return-path: Received: from mail-vc0-f181.google.com ([209.85.220.181]:62060 "EHLO mail-vc0-f181.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751119Ab2LTK7l (ORCPT ); Thu, 20 Dec 2012 05:59:41 -0500 Received: by mail-vc0-f181.google.com with SMTP id gb30so3508359vcb.40 for ; Thu, 20 Dec 2012 02:59:40 -0800 (PST) MIME-Version: 1.0 In-Reply-To: References: From: =?ISO-8859-1?Q?G=E1bor_Stefanik?= Date: Thu, 20 Dec 2012 11:28:15 +0100 Message-ID: (sfid-20121220_115950_602072_B95DC720) Subject: Re: Incoherency in iw (or mac80211 or drivers) behavior -- possible BUG in iwl4965 To: Danilo Cc: linux-wireless@vger.kernel.org Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-wireless-owner@vger.kernel.org List-ID: On Thu, Dec 20, 2012 at 11:25 AM, Danilo wrote: > Danilo writes: > >> >> Hello, >> I figured out that the command: >> >> iw dev wlan0 set bitrates legacy-5 24 >> >> has different behaviors in different devices. >> >> With iwl3945 wireless cards, it fixes the rate at 24Mbps ALSO for multicast >> frames while in iwl4965 cards, it doesn't. >> >> In both cases I tried with ubuntu linux 12.04 and kernel-3.2.0-32-generic > using >> iwl4965/iwl_legacy driver for 4965 and iwl3945/iwl_legacy driver for 3945. >> >> I've also tried with compat-wireless-3.6, same result. >> >> What's the expected behavior? >> >> Thanks in advance, >> D. Tardioli >> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-wireless" in >> the body of a message to majordomo@... >> More majordomo info at http://vger.kernel.org/majordomo-info.html >> >> > > Hello, > I answer myself: > I've tried with ath5k-compatible card and it behaves like iwl3945. > It means that when fixed the bitrates with a single value, the card always use > that bitrate ALSO for broadcast frames. > > The iwl4965 doesn't behave this way. > Any suggestion on how to solve the problem? IIRC iwl4965 uses its own rate control algorithm (a while ago, it was called "iwl-agn-rs", before the iwlegacy split). I think you should look for the problem there. -- Vista: [V]iruses, [I]ntruders, [S]pyware, [T]rojans and [A]dware. :-)