Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752454Ab3JLGAb (ORCPT ); Sat, 12 Oct 2013 02:00:31 -0400 Received: from pyr75-3-78-192-68-46.fbxo.proxad.net ([78.192.68.46]:59357 "EHLO molly.corsac.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750754Ab3JLGA3 (ORCPT ); Sat, 12 Oct 2013 02:00:29 -0400 X-Greylist: delayed 369 seconds by postgrey-1.27 at vger.kernel.org; Sat, 12 Oct 2013 02:00:29 EDT Message-ID: <1381557623.3261.69.camel@scapa> Subject: Re: [PATCH v5 0/4] Fix Win8 backlight issue From: Yves-Alexis Perez To: "Rafael J. Wysocki" Cc: Josh Boyer , Aaron Lu , linux-acpi@vger.kernel.org, intel-gfx@lists.freedesktop.org, DRI mailing list , "Linux-Kernel@Vger. Kernel. Org" , Daniel Vetter , Matthew Garrett , Seth Forshee , Lee Chun-Yi , Richard Purdie , Igor Gnatenko , Felipe Contreras , Jani Nikula , Ben Jencks , Steven Newbury , James Hogan , Kamal Mostafa , Joerg Platte , Kalle Valo , Martin Steigerwald , =?ISO-8859-1?Q?J=F6rg?= Otte , Mike Galbraith , platform-driver-x86@vger.kernel.org, Mika Westerberg Date: Sat, 12 Oct 2013 08:00:23 +0200 In-Reply-To: <1712683.D4Gy4SDE7p@vostro.rjw.lan> References: <1381498066-16011-1-git-send-email-aaron.lu@intel.com> <1712683.D4Gy4SDE7p@vostro.rjw.lan> Content-Type: multipart/signed; micalg="pgp-sha256"; protocol="application/pgp-signature"; boundary="=-hk57K5Ex5bD5LhQDByw5" X-Mailer: Evolution 3.8.5-2 Mime-Version: 1.0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2283 Lines: 58 --=-hk57K5Ex5bD5LhQDByw5 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On sam., 2013-10-12 at 00:10 +0200, Rafael J. Wysocki wrote: > On Friday, October 11, 2013 12:42:43 PM Josh Boyer wrote: > > On Fri, Oct 11, 2013 at 9:27 AM, Aaron Lu wrote: > > > v5: > > > 1 Introduce video.use_native_backlight module parameter and set its > > > value to false by default as suggested by Rafael. For Win8 systems > > > which have broken ACPI video backlight control, the parameter can b= e > > > set to 1 in kernel cmdline to skip registering ACPI video's backlig= ht > > > interface. Due to this change, the acpi_video_verify_backlight_supp= ort > > > is moved from video_detect.c to video.c - patch 3/4; > >=20 > > That's a fairly untenable position for distro kernels to be in. They > > now have to ask every user that reports an issue with the backlight to > > try setting that option on the command line. While I appreciate the > > setting breaks things for some people, doesn't the Win8 issue impact > > far more people? Shouldn't it be defaulted to true? >=20 > Well, we have a rule in the kernel not to introduce regressions for users= even > if they are minority. Well, for some users, the regression actually happened when support for Win8 OSI call was introduced. Regards, --=20 Yves-Alexis --=-hk57K5Ex5bD5LhQDByw5 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: This is a digitally signed message part -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.15 (GNU/Linux) iQEcBAABCAAGBQJSWOV3AAoJEG3bU/KmdcClCvwH/i78Wc1sG+ChWdsYJw3TLfzQ MnyOfElTe2YqEc49bQ8/lwbBBaCInE7Og//SSGLE6bNeS2y6UTGyRWhqTA9WQ6tb 3Y4fWvk7l5qtB1SsaT3s+TxSIICscrU6QWB1R7TXiIOOZweDH6nKMt6EJcqNjpIQ QU2Hp3tthcJlOnAzTMDTsxv/sibLvnGlcHJEFnr1Dxcr1et59HeDiYFRbexcaO1j PGjt28NY1I4NokWCe+Y1iVPfE/bQH6MaVhmalVarIya/0QFR/C+zbEmatyiykec6 EVWxQ4dRAUWbnp8IXt97+UsTGY5gaVL0KsIq2qyBLNEX6vWqBD1fA+mehy87kXE= =XicM -----END PGP SIGNATURE----- --=-hk57K5Ex5bD5LhQDByw5-- -- 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/