From patchwork Mon Dec 3 01:15:36 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhang Rui X-Patchwork-Id: 1831751 Return-Path: X-Original-To: patchwork-linux-acpi@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork1.kernel.org (Postfix) with ESMTP id BE4DE3FCA5 for ; Mon, 3 Dec 2012 01:15:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754427Ab2LCBPl (ORCPT ); Sun, 2 Dec 2012 20:15:41 -0500 Received: from mga02.intel.com ([134.134.136.20]:61607 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754360Ab2LCBPl (ORCPT ); Sun, 2 Dec 2012 20:15:41 -0500 Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga101.jf.intel.com with ESMTP; 02 Dec 2012 17:15:40 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.84,202,1355126400"; d="scan'208,223";a="228030995" Received: from unknown (HELO [10.255.21.163]) ([10.255.21.163]) by orsmga001.jf.intel.com with ESMTP; 02 Dec 2012 17:15:38 -0800 Message-ID: <1354497336.1936.18.camel@rzhang1-mobl4> Subject: [PATCH] ACPI video: ignore BIOS initial backlight value for HP Folio 13-2000 From: Zhang Rui To: "Rafael J. Wysocki" Cc: ACPI Devel Maling List , "Zhang, Rui" , public@stefan-nagy.at, stable@vger.kernel.org Date: Mon, 03 Dec 2012 09:15:36 +0800 X-Mailer: Evolution 3.2.3-0ubuntu6 Mime-Version: 1.0 Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org From 117af51d695c78bfdf618a183664f0e9f3769b9a Mon Sep 17 00:00:00 2001 From: Zhang Rui Date: Sun, 2 Dec 2012 10:00:41 +0800 Subject: [PATCH] ACPI video: ignore BIOS initial backlight value for HP Folio 13-2000 Or else the laptop will boot with a dimmed screen. https://bugzilla.kernel.org/show_bug.cgi?id=51141 Signed-off-by: Zhang Rui Tested-by: Stefan Nagy Cc: stable@vger.kernel.org --- drivers/acpi/video.c | 14 ++++++++++++++ 1 file changed, 14 insertions(+) diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c index 1e0a9e1..58bddd3 100644 --- a/drivers/acpi/video.c +++ b/drivers/acpi/video.c @@ -389,6 +389,12 @@ static int __init video_set_bqc_offset(const struct dmi_system_id *d) return 0; } +static int video_ignore_initial_backlight(const struct dmi_system_id *d) +{ + use_bios_initial_backlight = 0; + return 0; +} + static struct dmi_system_id video_dmi_table[] __initdata = { /* * Broken _BQC workaround http://bugzilla.kernel.org/show_bug.cgi?id=13121 @@ -433,6 +439,14 @@ static struct dmi_system_id video_dmi_table[] __initdata = { DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 7720"), }, }, + { + .callback = video_ignore_initial_backlight, + .ident = "HP Folio 13-2000", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), + DMI_MATCH(DMI_PRODUCT_NAME, "HP Folio 13 - 2000 Notebook PC"), + }, + }, {} };