From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965063AbbA1EYI (ORCPT ); Tue, 27 Jan 2015 23:24:08 -0500 Received: from mail.kernel.org ([198.145.29.136]:40531 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964977AbbA1EYE (ORCPT ); Tue, 27 Jan 2015 23:24:04 -0500 From: lizf@kernel.org To: stable@vger.kernel.org Cc: linux-kernel@vger.kernel.org, Hans de Goede , Darren Hart , Zefan Li Subject: [PATCH 3.4 123/177] acer-wmi: Add acpi_backlight=video quirk for the Acer KAV80 Date: Wed, 28 Jan 2015 12:09:41 +0800 Message-Id: <1422418236-12852-214-git-send-email-lizf@kernel.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1422418050-12581-1-git-send-email-lizf@kernel.org> References: <1422418050-12581-1-git-send-email-lizf@kernel.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Hans de Goede 3.4.106-rc1 review patch. If anyone has any objections, please let me know. ------------------ commit 183fd8fcd7f8afb7ac5ec68f83194872f9fecc84 upstream. The acpi-video backlight interface on the Acer KAV80 is broken, and worse it causes the entire machine to slow down significantly after a suspend/resume. Blacklist it, and use the acer-wmi backlight interface instead. Note that the KAV80 is somewhat unique in that it is the only Acer model where we fall back to acer-wmi after blacklisting, rather then using the native (e.g. intel) backlight driver. This is done because there is no native backlight interface on this model. BugLink: https://bugzilla.redhat.com/show_bug.cgi?id=1128309 Signed-off-by: Hans de Goede Signed-off-by: Darren Hart Signed-off-by: Zefan Li --- drivers/platform/x86/acer-wmi.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c index c1a3fd8..4d04731 100644 --- a/drivers/platform/x86/acer-wmi.c +++ b/drivers/platform/x86/acer-wmi.c @@ -523,6 +523,17 @@ static const struct dmi_system_id video_vendor_dmi_table[] = { DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4750"), }, }, + { + /* + * Note no video_set_backlight_video_vendor, we must use the + * acer interface, as there is no native backlight interface. + */ + .ident = "Acer KAV80", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "Acer"), + DMI_MATCH(DMI_PRODUCT_NAME, "KAV80"), + }, + }, {} }; -- 1.9.1