From patchwork Mon Jun 17 17:30:42 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kamal Mostafa X-Patchwork-Id: 251965 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from huckleberry.canonical.com (huckleberry.canonical.com [91.189.94.19]) by ozlabs.org (Postfix) with ESMTP id 566B72C029E for ; Tue, 18 Jun 2013 03:34:01 +1000 (EST) Received: from localhost ([127.0.0.1] helo=huckleberry.canonical.com) by huckleberry.canonical.com with esmtp (Exim 4.76) (envelope-from ) id 1UodJS-00033a-PY; Mon, 17 Jun 2013 17:33:54 +0000 Received: from youngberry.canonical.com ([91.189.89.112]) by huckleberry.canonical.com with esmtp (Exim 4.76) (envelope-from ) id 1UodJG-0002ws-19 for kernel-team@lists.ubuntu.com; Mon, 17 Jun 2013 17:33:42 +0000 Received: from c-67-160-231-42.hsd1.ca.comcast.net ([67.160.231.42] helo=fourier) by youngberry.canonical.com with esmtpsa (TLS1.0:DHE_RSA_AES_128_CBC_SHA1:16) (Exim 4.71) (envelope-from ) id 1UodHJ-0007D9-Vm; Mon, 17 Jun 2013 17:31:42 +0000 Received: from kamal by fourier with local (Exim 4.80) (envelope-from ) id 1UodHH-00066U-O3; Mon, 17 Jun 2013 10:31:39 -0700 From: Kamal Mostafa To: linux-kernel@vger.kernel.org, stable@vger.kernel.org, kernel-team@lists.ubuntu.com Subject: [PATCH 38/84] ACPI / video: ignore BIOS initial backlight value for HP m4 Date: Mon, 17 Jun 2013 10:30:42 -0700 Message-Id: <1371490288-23167-39-git-send-email-kamal@canonical.com> X-Mailer: git-send-email 1.8.1.2 In-Reply-To: <1371490288-23167-1-git-send-email-kamal@canonical.com> References: <1371490288-23167-1-git-send-email-kamal@canonical.com> X-Extended-Stable: 3.8 Cc: Alex Hung , "Rafael J. Wysocki" , Kamal Mostafa X-BeenThere: kernel-team@lists.ubuntu.com X-Mailman-Version: 2.1.14 Precedence: list List-Id: Kernel team discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: kernel-team-bounces@lists.ubuntu.com Sender: kernel-team-bounces@lists.ubuntu.com 3.8.13.3 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Alex Hung commit fedbe9bc6fd3e14b1ffbb3dac407777ac4a3650c upstream. On HP m4 lapops, BIOS reports minimum backlight on boot and causes backlight to dim completely. This ignores the initial backlight values and set to max brightness. References: https://bugs.launchpad.net/bugs/1184501 Signed-off-by: Alex Hung Signed-off-by: Rafael J. Wysocki Signed-off-by: Kamal Mostafa --- drivers/acpi/video.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c index a6e1a4d..afc2a8d 100644 --- a/drivers/acpi/video.c +++ b/drivers/acpi/video.c @@ -463,6 +463,14 @@ static struct dmi_system_id video_dmi_table[] __initdata = { DMI_MATCH(DMI_PRODUCT_NAME, "HP 1000 Notebook PC"), }, }, + { + .callback = video_ignore_initial_backlight, + .ident = "HP Pavilion m4", + .matches = { + DMI_MATCH(DMI_BOARD_VENDOR, "Hewlett-Packard"), + DMI_MATCH(DMI_PRODUCT_NAME, "HP Pavilion m4 Notebook PC"), + }, + }, {} };