Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755527Ab3JNBCc (ORCPT ); Sun, 13 Oct 2013 21:02:32 -0400 Received: from tango.0pointer.de ([85.214.72.216]:41162 "EHLO tango.0pointer.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755400Ab3JNBCb (ORCPT ); Sun, 13 Oct 2013 21:02:31 -0400 X-Greylist: delayed 442 seconds by postgrey-1.27 at vger.kernel.org; Sun, 13 Oct 2013 21:02:30 EDT Date: Mon, 14 Oct 2013 02:55:05 +0200 From: Lennart Poettering To: Len Brown , "Rafael J. Wysocki" Cc: linux-acpi@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] acpi/video: Add Lenovo IdeaPad Yoga 13 to acpi video detect blacklist Message-ID: <20131014005505.GA30503@tango.0pointer.de> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Organization: Red Hat, Inc. X-Campaign-1: () ASCII Ribbon Campaign X-Campaign-2: / Against HTML Email & vCards - Against Microsoft Attachments User-Agent: Leviathan/19.8.0 [zh] (Cray 3; I; Solaris 4.711; Console) Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1730 Lines: 53 On the Yoga 13 the backlight control doesn't work via ACPI. (And doesn't work either with the low-level platform driver ideapad_laptop; but works correctly via the intel video driver). This patch hence adds the Yoga 13 to the ACPI video detect blacklist, to make sure the broken ACPI backlight device is never exposed to userspace. Note that this appears unrelated to the Windows 8 backlight issues tracked here: https://bugzilla.kernel.org/show_bug.cgi?id=51231 https://bugzilla.kernel.org/show_bug.cgi?id=60682 The Yoga's ACPI backlight controls work neither with nor without acpi_osi="!Windows 2012" on the kernel command line. It appears that backlight control via the EC simply is not available at all, regardless whether done via ACPI or via the vendor driver. Signed-off-by: Lennart Poettering --- drivers/acpi/video_detect.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c index 940edbf..a88e8f7 100644 --- a/drivers/acpi/video_detect.c +++ b/drivers/acpi/video_detect.c @@ -168,6 +168,14 @@ static struct dmi_system_id video_detect_dmi_table[] = { DMI_MATCH(DMI_PRODUCT_NAME, "UL30A"), }, }, + { + .callback = video_detect_force_vendor, + .ident = "Lenovo Yoga 13", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_VERSION, "Lenovo IdeaPad Yoga 13"), + }, + }, { }, }; -- 1.8.3.1 Lennart -- Lennart Poettering - Red Hat, Inc. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/