From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1757086Ab1KKPBN (ORCPT ); Fri, 11 Nov 2011 10:01:13 -0500 Received: from ackle.nomi.cz ([81.31.33.35]:54165 "EHLO ackle.nomi.cz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752585Ab1KKPBJ (ORCPT ); Fri, 11 Nov 2011 10:01:09 -0500 Date: Fri, 11 Nov 2011 16:01:05 +0100 From: =?utf-8?B?VG9tw6HFoSBKYW5vdcWhZWs=?= To: Stanislaw Gruszka Cc: linux-kernel@vger.kernel.org, Wey-Yi Guy , linux-wireless@vger.kernel.org Subject: Re: iwlagn: memory corruption with WPA enterprise Message-ID: <20111111150105.GA25437@nomi.cz> References: <20111029171554.GA16596@nomi.cz> <20111031160342.GB2225@redhat.com> <20111109155411.GA1669@nomi.cz> <20111109165158.GA2254@redhat.com> <20111110091816.GA2247@nomi.cz> <20111110114732.GA2217@redhat.com> <20111110125347.GA29415@nomi.cz> <20111110160703.GA2775@redhat.com> <20111110163051.GA24533@nomi.cz> <20111111054731.GA2292@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: <20111111054731.GA2292@redhat.com> User-Agent: Mutt/1.5.19 (2009-01-05) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, On Fri, Nov 11, 2011 at 06:47:31AM +0100, Stanislaw Gruszka wrote: > On Thu, Nov 10, 2011 at 05:30:51PM +0100, Tomáš Janoušek wrote: > > I think all those T520 and T420s models have exactly the same wireless card. I > > don't see why they wouldn't have. :-) > > Well, laptops models have common mainboards, but peripheral components > might not be identical. Especially wireless card might vary from unit > to unit. For example: > > T520 with iwl6300: > http://smolt.fedoraproject.org/client/show/pub_0cbc8731-47d3-4ecf-8add-aa832b34edcd > T520 with iwl1000: > http://smolt.fedoraproject.org/client/show/pub_02f601d6-7a93-4c0e-bc01-a4a95db36086 > T520 with iwl6205: > http://smolt.fedoraproject.org/client/show/pub_0232252f-75a9-4050-a69b-c8e95e00eaf2 These links don't work, but my colleagues indeed do have iwl6205. They are, however, running 64-bit kernels, so I tried doing the same and I haven't been able to reproduce the issue for the past few hours. So it seems like it happens on 32-bit kernels only. This looks like a good workaround (better than getting a different wireless card), so I can run 64-bit during working days and experiment with 32-bit when I have time to debug this. Could you please elaborate on that thing with enabling IOMMU? The only thing I know about IOMMU is that it is somehow related to VT-d (passing whole PCI devices to virtual guests), and that I have to pass intel_iommu=off to kernel command line, otherwise the machine doesn't even boot. Is that a problem? Kind regards, -- Tomáš Janoušek, a.k.a. Liskni_si, http://work.lisk.in/