From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stephen Chandler Paul Subject: [PATCH] Favor native backlight interface for ThinkPad Helix Date: Fri, 4 Apr 2014 10:44:46 -0400 Message-ID: <1396622686-6373-1-git-send-email-thatslyude@gmail.com> Return-path: Received: from mail-ie0-f175.google.com ([209.85.223.175]:36213 "EHLO mail-ie0-f175.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752748AbaDDOns (ORCPT ); Fri, 4 Apr 2014 10:43:48 -0400 Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: Zhang Rui , "Rafael J. Wysocki" , Len Brown , linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org Cc: Shawn Rutledge Like many other Windows 8 laptops the ThinkPad Helix's backlight has a broken ACPI interface and can only be properly adjusted by using the video card's native backlight control. This adds the ThinkPad Helix to the list of laptops affected with this issue so that video.use_native_backlight is enabled by default. Signed-off-by: Stephen Chandler Paul --- drivers/acpi/video.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/acpi/video.c b/drivers/acpi/video.c index 48c7e8a..8b6990e 100644 --- a/drivers/acpi/video.c +++ b/drivers/acpi/video.c @@ -488,6 +488,14 @@ static struct dmi_system_id video_dmi_table[] __initdata = { }, }, { + .callback = video_set_use_native_backlight, + .ident = "Thinkpad Helix", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad Helix"), + }, + }, + { .callback = video_set_use_native_backlight, .ident = "Dell Inspiron 7520", .matches = { -- 1.8.3.2