From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ralf Gerbig Subject: Patch Thinkpad X201T backlight Date: Sun, 22 May 2016 19:23:59 +0200 Message-ID: <8737p8aq7k.fsf@quengel.org> Mime-Version: 1.0 Content-Type: text/plain Return-path: Received: from static.94.121.46.78.clients.your-server.de ([78.46.121.94]:41383 "EHLO mail" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1753566AbcEXHPB (ORCPT ); Tue, 24 May 2016 03:15:01 -0400 Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org To: "Rafael J. Wysocki" Cc: linux-acpi@vger.kernel.org Hi, the X201 Tablet needs the same treatmant as the X201s, otherwise you can't change levels. The patch is against 4.5.5 stable, but should apply to all recent kernels. Please be gentle, I am neither a programmer nor a developer. If you have questions, feel free to ask, but don't expect an answer in the next 10 to 20 days (going to hospital). Regards, Ralf Gerbig --- commit a10b5a05eae1a990682ce238b8e0ac6ad791a8a9 Author: Ralf Gerbig Date: Sun May 22 18:56:22 2016 +0200 The Thinkpad X201 Tablet also needs video_detect_force_video Signed-off-by: Ralf Gerbig diff --git a/drivers/acpi/video_detect.c b/drivers/acpi/video_detect.c index 1316ddd..d8d7bd3 100644 --- a/drivers/acpi/video_detect.c +++ b/drivers/acpi/video_detect.c @@ -167,6 +167,14 @@ static const struct dmi_system_id video_detect_dmi_table[] = { DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201s"), }, }, + { + .callback = video_detect_force_video, + .ident = "ThinkPad X201T", + .matches = { + DMI_MATCH(DMI_SYS_VENDOR, "LENOVO"), + DMI_MATCH(DMI_PRODUCT_VERSION, "ThinkPad X201T"), + }, + }, /* The native backlight controls do not work on some older machines */ {