Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755026Ab3G2UXA (ORCPT ); Mon, 29 Jul 2013 16:23:00 -0400 Received: from mail-lb0-f172.google.com ([209.85.217.172]:61316 "EHLO mail-lb0-f172.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753875Ab3G2UW6 (ORCPT ); Mon, 29 Jul 2013 16:22:58 -0400 MIME-Version: 1.0 In-Reply-To: <7981076.SojlpLkL71@vostro.rjw.lan> References: <1375125658-1223-1-git-send-email-felipe.contreras@gmail.com> <7981076.SojlpLkL71@vostro.rjw.lan> Date: Mon, 29 Jul 2013 15:22:56 -0500 Message-ID: Subject: Re: [REGRESSION/PATCH] acpi: blacklist win8 OSI for ASUS Zenbok Prime UX31A From: Felipe Contreras To: "Rafael J. Wysocki" Cc: linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org, Len Brown , Linus Torvalds Content-Type: text/plain; charset=UTF-8 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1709 Lines: 42 On Mon, Jul 29, 2013 at 3:17 PM, Rafael J. Wysocki wrote: > On Monday, July 29, 2013 02:20:58 PM Felipe Contreras wrote: >> Since v3.7 the acpi backlight driver doesn't work at all on this machine >> because presumably the ACPI code contains stub code when Windows 8 OSI is >> reported. >> >> The commit ea45ea7 (in v3.11-rc2) tried to fix this problem by using the intel >> backlight driver, however, on this machine it turns the backlight completely >> off when it reaches level 0%, after which the user might have a lot trouble >> trying to bring it back. >> >> This patch fixes both regressions by blacklisting the win8 OSI, so we are back >> to v3.6 behavior, and it should remain that way until the intel backlight >> driver is fixed. > > Well, it really is a workaround, so perhaps it would be fair to call it this > way? Maybe, but to me, and to most users, the important thing is that it fixes a regression. >> Since v3.7, users have been forced to fix the initial regression by modifying >> the boot arguments [1]. >> >> [1] https://wiki.archlinux.org/index.php/ASUS_Zenbook_Prime_UX31A >> >> Signed-off-by: Felipe Contreras > > I don't really feel this is the right approach, but then I don't care enough > to fight with you. :-) It's not the right approach, I don't think I (or anybody) argued otherwise, but unless the Intel driver is fixed before 3.11, it's the only sane approach. -- Felipe Contreras -- 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/