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 X-Spam-Level: X-Spam-Status: No, score=-4.1 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id CFA53C4CEC6 for ; Thu, 12 Sep 2019 13:30:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A32B920856 for ; Thu, 12 Sep 2019 13:30:19 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="tNjTicGx" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1732111AbfILNaS (ORCPT ); Thu, 12 Sep 2019 09:30:18 -0400 Received: from mail-pl1-f194.google.com ([209.85.214.194]:40847 "EHLO mail-pl1-f194.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731687AbfILNaS (ORCPT ); Thu, 12 Sep 2019 09:30:18 -0400 Received: by mail-pl1-f194.google.com with SMTP id y10so11786338pll.7; Thu, 12 Sep 2019 06:30:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc:content-transfer-encoding; bh=T7yOTc6AM6CK4gI48nKg1cFnDjTACpLQV/CXZUsKR78=; b=tNjTicGxO56p1XVGcD8R3SxrHsRfwvYzbGKguNRV7sO40XGVOHV5rVXh16qYZhZgVt DPoBqyuME4XSrI+umr8GzhBo+NKyF3MaYou3a0ojeUZYfLWPrIZ/EqIv6BNGMTLgxMDc yk7ufN+8EYPqZFipnLczteXiDYrUABYvaZd7zitEDEG8aGbp+l9Tvop/dpQB2d8cqOfN IbNtx6IYNzayMY+sSSQJJ6G4JPtsUccWz3mD3CAPEPrdiwnR4sHKg3aeh/YflHlEfLh/ Xrc1I2Wfqk5HA9/1CBmCiFlMGP4sFjnt1EuaFcNnhlBX6PUiYfwBnAjmvgzDABJ1+l5X rjlQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc:content-transfer-encoding; bh=T7yOTc6AM6CK4gI48nKg1cFnDjTACpLQV/CXZUsKR78=; b=ickVE1QgvkY8qLu2QT4dhxb8/MpMGVNdAG/KzPDTMvr209Kjm5l9SX84gA7mYa4lnD vWSjQkbTnY8X1ICgqkTcbTkzpiilu5TM+VVDMDHqbo+K9e55t00aADwhq/wxaJ5NA1VX 6d67V8uWExy5QdJx/2fI+h56uTAWxzPOcs9OODGUZ15KBO7tMAMSgf18iJJIL2rRwYiu uY+r3FbFat6UK3cfalNX20QZr8xA3TvUoLB5VSZhzGaTcu+RU3c3eJiu9IfUpHzGA/l9 dZCmcOiU13AxL5VpYPniQ4GSK7RMyP08teaaOsYeoSgGI7oV+z5WRJ+dOO591mEFBtZe Smww== X-Gm-Message-State: APjAAAVOpSWBpB8JMsquC193GILEo0VI209L63WBGTpfU83bhWa5+WK1 HQdeWBxSDtjAt3SMwMMTZyUfPqJK3Du0vmDQFjw7f0HLREU= X-Google-Smtp-Source: APXvYqwojJdrFarStObqD+Wc9p1tMfp1r8LGvX3LBSNGJLOSHqNL50xJuCMKrck9hk4lYk9fbHFGsobbwWb1JIZXN20= X-Received: by 2002:a17:902:b208:: with SMTP id t8mr6801182plr.262.1568295017642; Thu, 12 Sep 2019 06:30:17 -0700 (PDT) MIME-Version: 1.0 References: <156824368856.28378.14511879419677114177@WARFSTATION> <20190912073358.n5bxqosowhky5uhb@pali> In-Reply-To: <20190912073358.n5bxqosowhky5uhb@pali> From: Andy Shevchenko Date: Thu, 12 Sep 2019 16:30:06 +0300 Message-ID: Subject: Re: [PATCH] platform/x86: dell-laptop: fix phantom kbd backlight on Inspiron 10xx To: =?UTF-8?Q?Pali_Roh=C3=A1r?= , Mario Limonciello Cc: Pacien TRAN-GIRARD , Matthew Garrett , Darren Hart , Andy Shevchenko , Platform Driver , Linux Kernel Mailing List Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org +Cc: Mario On Thu, Sep 12, 2019 at 10:34 AM Pali Roh=C3=A1r wro= te: > > On Thursday 12 September 2019 01:14:48 Pacien TRAN-GIRARD wrote: > > This patch registers a quirk disabling keyboard backlight support > > for the Dell Inspiron 1012 and 1018. > > > > Those models wrongly report supporting the KBD_LED_OFF_TOKEN and > > KBD_LED_ON_TOKEN SMBIOS tokens, exposing keyboard brightness controls > > through sysfs which freeze the system when used. > > > > The associated SMBIOS calls never return and cause the system to > > hang, notably at boot when systemd-backlight tries to restore > > previous brightness settings. > > Hi! This sounds like a firmware bug. Have you already reported it to Dell= ? > > > Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=3D107651 > > Signed-off-by: Pacien TRAN-GIRARD > > -- > Pali Roh=C3=A1r > pali.rohar@gmail.com --=20 With Best Regards, Andy Shevchenko