From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id B05DFC4708D for ; Sun, 4 Dec 2022 09:37:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229984AbiLDJhx (ORCPT ); Sun, 4 Dec 2022 04:37:53 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:52256 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229834AbiLDJhv (ORCPT ); Sun, 4 Dec 2022 04:37:51 -0500 Received: from wp530.webpack.hosteurope.de (wp530.webpack.hosteurope.de [80.237.130.52]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D6425BE0D; Sun, 4 Dec 2022 01:37:47 -0800 (PST) Received: from [2a02:8108:963f:de38:eca4:7d19:f9a2:22c5]; authenticated by wp530.webpack.hosteurope.de running ExIM with esmtpsa (TLS1.3:ECDHE_RSA_AES_128_GCM_SHA256:128) id 1p1lRP-0005zX-FS; Sun, 04 Dec 2022 10:37:43 +0100 Message-ID: <0611323c-2088-e6f3-1c38-7cf742dfb60d@leemhuis.info> Date: Sun, 4 Dec 2022 10:37:42 +0100 MIME-Version: 1.0 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:102.0) Gecko/20100101 Thunderbird/102.5.0 Subject: Re: [regression] Bug 216753 - 6e 6 ghz bands are disabled since 5.16 on intel ax211 Content-Language: en-US, de-DE To: mbizon@freebox.fr, Dave Chiluk , Marcel Holtmann Cc: "Coelho, Luciano" , "Greenman, Gregory" , "linux-wireless@vger.kernel.org" , Johannes Berg , "regressions@lists.linux.dev" , "linux-kernel@vger.kernel.org" References: <14722778-dda0-cb9f-8647-892493d94a5c@leemhuis.info> <2026016246ef719605c9932feeb56b105833593b.camel@intel.com> <9a03c244-adff-afaf-7385-d8e89cd3f338@leemhuis.info> <02F8DDF1-EC0D-4EBD-88F5-7E000841C337@holtmann.org> <19ea39c87df3c54cbc487466f806bc157d0bf563.camel@freebox.fr> From: Thorsten Leemhuis In-Reply-To: <19ea39c87df3c54cbc487466f806bc157d0bf563.camel@freebox.fr> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit X-bounce-key: webpack.hosteurope.de;regressions@leemhuis.info;1670146668;829b5fee; X-HE-SMSGID: 1p1lRP-0005zX-FS Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 02.12.22 18:42, Maxime Bizon wrote: > On Fri, 2022-12-02 at 11:18 -0600, Dave Chiluk wrote: > >> The 6ghz band becomes disabled as soon as I upgrade to the 5.16+ >> linux-stable kernels. So from a user perspective this really is a >> case of a kernel upgrade breaking user-space. This is what led me >> down this rabbit hole here. > > FWIW > > I have the same issue on a Lenovo T14 gen2 laptop with built-in ax210 > card, and sold as Wifi-6E compliant. > > The exact patch you mention causes the issue, so it seems my bios does > not return the correct values either. That makes me (as a outsider that has no real knowledge about the inner workings of the Linux Wifi subsystem) wonder: Does it work in Windows? Because if that's the case I wonder how Windows ensures everything confirms to regulatory requirements & standards. If that handled on the software level if the info is missing in the firmware? Or is there a another place in the firmware structures where Windows looks for details (and we don't). Or is that a Linux-only machine that might even use a different firmware? Ciao, Thorsten (wearing his 'the Linux kernel's regression tracker' hat) P.S.: As the Linux kernel's regression tracker I deal with a lot of reports and sometimes miss something important when writing mails like this. If that's the case here, don't hesitate to tell me in a public reply, it's in everyone's interest to set the public record straight.