Return-path: Received: from wa-out-1112.google.com ([209.85.146.183]:13381 "EHLO wa-out-1112.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757270AbYFONrf convert rfc822-to-8bit (ORCPT ); Sun, 15 Jun 2008 09:47:35 -0400 Received: by wa-out-1112.google.com with SMTP id j37so3973077waf.23 for ; Sun, 15 Jun 2008 06:47:32 -0700 (PDT) Message-ID: <1ba2fa240806150647mdc97d98oad0b1b02de1fcf87@mail.gmail.com> (sfid-20080615_154738_279895_6BFA7D2B) Date: Sun, 15 Jun 2008 16:47:32 +0300 From: "Tomas Winkler" To: "Maxim Levitsky" Subject: Re: [ipw3945-devel] [BUG] iwlwifi 3945 works only with disable_hw_scan=1 Cc: "=?ISO-8859-1?Q?Tor_H=E5kon_Haugen?=" , "Zhu Yi" , linux-wireless@vger.kernel.org, ipw3945-devel@lists.sourceforge.net In-Reply-To: <48551C62.80904@gmail.com> MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 References: <484FEA26.1040305@gmail.com> <1213241315.7814.696.camel@debian.sh.intel.com> <20080612135936.GA5031@tuxdriver.com> <1213342523.7814.865.camel@debian.sh.intel.com> <20080613130310.GA5333@tuxdriver.com> <48528B63.5030403@gmail.com> <48528CF0.8050204@gmail.com> <1ba2fa240806131304n442972eatfd2f35034476c380@mail.gmail.com> <48551C62.80904@gmail.com> Sender: linux-wireless-owner@vger.kernel.org List-ID: On Sun, Jun 15, 2008 at 4:42 PM, Maxim Levitsky wrote: > Tomas Winkler wrote: >> >> On Fri, Jun 13, 2008 at 6:06 PM, Maxim Levitsky >> wrote: >>> >>> Tor H=E5kon Haugen wrote: >>>> >>>> John W. Linville wrote: >>>>> >>>>> On Fri, Jun 13, 2008 at 03:35:23PM +0800, Zhu Yi wrote: >>>>>> >>>>>> On Thu, 2008-06-12 at 09:59 -0400, John W. Linville wrote: >>>>>>> >>>>>>> Honestly I'm tempted to change it to "enable_hw_scan" instead..= =2E >>>>>> >>>>>> Give the advantages, I'd like to use it if we can fix the bug (I >>>>>> haven't >>>>>> seen what the bug is myself). But you are free to change the def= ault >>>>>> value until it is fixed. There is no such problem for 4965, righ= t? >>>>> >>>>> AFAICT only the 3945 seems to need it. >>>>> >>>> I can confirm that this also applies to 4965 as a friend of mine h= as >>>> this card. According to him the card works a lot better with the >>>> parameters "swcrypto=3D1" and "disable_hw_scan=3D1". >>> >>> Just to make it clear, >>> iwl3945 doesn't work at all without disable_hw_scan=3D1 here. >>> The driver just shuts down thee card since it detects microcode err= or. >>> >> >> It looks like this is all caused by the big rate, band patch. Looks >> like A band scan channels are not configured correctly for the >> scanning. This crashes the firmware. >> >> Tomas > > Probably, I see that eeprom according to dmesg contains no info about= A > channels, so maybe this crashes the firmware. > Can you please send your dmesg. > I have few questions: > > * Is there a software workaround without the need to update the firmw= are? Yes > * Is the firmware error so harmful, so driver can't continue? This is firmware misconfiguration. Driver should be friendly to firmware and use correctly API. > * Can I expect updated version of the firmware with fix? No need so far. > Sadly this confirms that firmware is worse that I thought, it is clos= er to > closed drivers. The firmware API is open, it just wasn't used correctly. > (Although intel isn't guilty in this case due to regulations.) Thanks Tomas -- To unsubscribe from this list: send the line "unsubscribe linux-wireles= s" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html