Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751842Ab3CZQz6 (ORCPT ); Tue, 26 Mar 2013 12:55:58 -0400 Received: from cora.hrz.tu-chemnitz.de ([134.109.228.40]:42466 "EHLO cora.hrz.tu-chemnitz.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751595Ab3CZQz4 (ORCPT ); Tue, 26 Mar 2013 12:55:56 -0400 Message-ID: <5151D319.5040104@web.de> Date: Tue, 26 Mar 2013 17:55:53 +0100 From: Danny Baumann User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:17.0) Gecko/20130311 Thunderbird/17.0.4 MIME-Version: 1.0 To: David Airlie , intel-gfx@lists.freedesktop.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org Subject: Re: [PATCH 1/1] drm/i915: Allow specifying a minimum brightness level for sysfs control. References: <1364298525-4337-1-git-send-email-dannybaumann@web.de> <1364298525-4337-2-git-send-email-dannybaumann@web.de> <20130326151313.GU9021@phenom.ffwll.local> In-Reply-To: <20130326151313.GU9021@phenom.ffwll.local> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-purgate: clean X-purgate-type: clean X-purgate-ID: 154106::1364316954-000004E7-36A545E0/0-0/0-0 X-Scan-AV: cora.hrz.tu-chemnitz.de;2013-03-26 17:55:54;ddc260a69d804a54086f9751d5898c53 X-Scan-SA: cora.hrz.tu-chemnitz.de;2013-03-26 17:55:54;7fc0f7f0a8d5e6da4d66c277ad3d3e85 X-Spam-Score: -1.0 (-) X-Spam-Report: --- Textanalyse SpamAssassin 3.3.1 (-1.0 Punkte) Fragen an/questions to: Postmaster TU Chemnitz * -1.0 ALL_TRUSTED Passed through trusted hosts only via SMTP * 0.0 FREEMAIL_FROM Sender email is commonly abused enduser mail provider * (dannybaumann[at]web.de) --- Ende Textanalyse Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1440 Lines: 34 Hi, > Thus far our assumption always was that the acpi backlight works better > than the intel native backlight. So everything only uses the intel > backlight if there's no other backlight driver by default. > > So if I should merge this as a general solution for Windows 8 machines not > working properly, we first need to figure out what windows does on these > machines and either disable the acpi backlight or adapt it. I fully agree to that. Making acpi_video control usable is preferable over using intel_backlight. As I lack the detail knowledge about the ACPI video stuff, I'd be great of one (or some) of you guys could look at the mentioned bug report ([1]) and comment on what the problem might be. I have added the basic needed information already and would be happy to provide any needed debugging info. > Adding more kernel options is not a viable solution for the backlight mess > imo. Actually I'm fine with hardcoding the percentage as well ;) I just figured it might make sense to make it controllable for special-case uses, while still making intel_backlight usable for the 'normal' use case. Regards, Danny [1] https://bugzilla.kernel.org/show_bug.cgi?id=55071 -- 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/