Return-path: Received: from mga03.intel.com ([143.182.124.21]:63087 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751448AbZEDT1n convert rfc822-to-8bit (ORCPT ); Mon, 4 May 2009 15:27:43 -0400 From: "Cahill, Ben M" To: Maxim Levitsky CC: iwlwifi maling list , linux-wireless Date: Mon, 4 May 2009 12:27:23 -0700 Subject: RE: [ipw3945-devel] IWL3945 always reports noise levels of -127 Message-ID: <02B3067C068D0549A8CCFCB17D4D318B3569A442@orsmsx502.amr.corp.intel.com> References: <1241213459.7082.54.camel@maxim-laptop> <02B3067C068D0549A8CCFCB17D4D318B3569A43A@orsmsx502.amr.corp.intel.com> <1241463816.4816.1.camel@maxim-laptop> In-Reply-To: <1241463816.4816.1.camel@maxim-laptop> Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Sender: linux-wireless-owner@vger.kernel.org List-ID: >-----Original Message----- >From: Maxim Levitsky [mailto:maximlevitsky@gmail.com] >Sent: Monday, May 04, 2009 3:04 PM >To: Cahill, Ben M >Cc: iwlwifi maling list; linux-wireless >Subject: RE: [ipw3945-devel] IWL3945 always reports noise >levels of -127 > >On Mon, 2009-05-04 at 11:53 -0700, Cahill, Ben M wrote: >> When one of our devices cannot figure out what the actual >noise level is, it reports -127. >> >> Newer devices are better at old devices at figuring noise >level. IIRC, 3945 cannot figure noise for CCK signals, and >may not be possible with OFDM as well. > >Why then it did work on older kernel ? >(and noise levels seemed to be correct) Hmmm, good point, and I don't know the answer! :-( Guess it deserves a bugzilla. Would you be willing to look in the source to see if you can figure out why? Looks like a search for "noise" in iwl-3945.c will lead in the right direction. -- Ben -- > >Regards, > Maxim Levitsky > >