Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753659AbYJ1QWt (ORCPT ); Tue, 28 Oct 2008 12:22:49 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1753194AbYJ1QWa (ORCPT ); Tue, 28 Oct 2008 12:22:30 -0400 Received: from mx30.mail.ru ([194.67.23.238]:4428 "EHLO mx30.mail.ru" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753009AbYJ1QW3 (ORCPT ); Tue, 28 Oct 2008 12:22:29 -0400 From: Andrey Borzenkov To: "Rafael J. Wysocki" Subject: Re: ACPI video.c brightness handler conflicts with toshiba_acpi Date: Tue, 28 Oct 2008 19:22:12 +0300 User-Agent: KMail/1.9.10 Cc: Thomas Renninger , Len Brown , toshiba_acpi@memebeam.org, linux-acpi@vger.kernel.org, Linux Kernel Mailing List References: <200809061108.34877.arvidjaar@mail.ru> <200810281426.53499.trenn@suse.de> <200810281615.19894.rjw@sisk.pl> In-Reply-To: <200810281615.19894.rjw@sisk.pl> MIME-Version: 1.0 Content-Type: multipart/signed; boundary="nextPart8633294.OmLpcteX02"; protocol="application/pgp-signature"; micalg=pgp-sha1 Content-Transfer-Encoding: 7bit Message-Id: <200810281922.20490.arvidjaar@mail.ru> X-Spam: Not detected X-Mras: OK Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 3511 Lines: 99 --nextPart8633294.OmLpcteX02 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Content-Disposition: inline On Tuesday 28 October 2008, Rafael J. Wysocki wrote: > On Tuesday, 28 of October 2008, Thomas Renninger wrote: > > On Monday 27 October 2008 17:52:55 Andrey Borzenkov wrote: > > > On Monday 08 September 2008, Thomas Renninger wrote: > > > > On Saturday 06 September 2008 09:19:59 am Andrey Borzenkov wrote: > > > > > On Saturday 06 September 2008, Andrey Borzenkov wrote: > > > > > > I have now two different devices that refer to the same hardwar= e: > > > > > > > > > > > > lrwxrwxrwx 1 root root 0 2008-09-06 11:04 acpi_video0 -> > > > > > > ../../devices/virtual/backlight/acpi_video0/ lrwxrwxrwx 1 root = root 0 > > > > > > 2008-09-06 11:04 toshiba -> ../../devices/virtual/backlight/tos= hiba/ > > > > > > > > > > > > Unfortunately, due to ACPI implementation the acpi_video0 one i= s much > > > > > > inferior (as it provides only effectively two levels instead of= 8); > > > > > > and user level tools are apparently quite confused which one to > > > > > > select. > > > > > > > > > > > > Is there any mechanism that would allow tochiba_acpi to claim > > > > > > brightness for internal LCD screen that video would not attempt= to > > > > > > grab it too? > > > > > > > > > > > > Of course manually disabling brightness handling in video is al= ways > > > > > > possible, > > > > > > > > > > Actually it is not. brightness_switch_enabled only disables event > > > > > handling; it still resets actual brightness on loading and creates > > > > > sysfs files to confuse user space. > > > > > > > > > > > still is nice for this to be handled automatically. > > > > > > > > It is in latest ACPI test branch queued for 2.6.28. > > > > > > It is still not in rc2; is it scheduled for 2.6.28 or delayed further? > >=20 > > Right, it's not there. > > Len, what happened with the: > > "Check for ACPI backlight support otherwise use vendor ACPIdrivers - ve= rsion 4" > > patches? > >=20 > > They are pretty essential for video.ko. > > Otherwise graphics devices may get double poked (through vendor_acpi.ko= drivers) > > or may register for graphics cards which are not there. >=20 > Do you have a pointer to those patches? >=20 So far I am running with these commits from git://git.kernel.org/pub/scm/li= nux/kernel/git/ak/linux-acpi-2.6: commit f43d728731c691772ddc29e50d25c68a859935b5 Author: Thomas Renninger Date: Fri Aug 1 17:37:55 2008 +0200 Check for ACPI backlight support otherwise use vendor ACPI drivers commit ad9ed8385ed6ec5be8da7094db911c824258ceec Author: Thomas Renninger Date: Fri Aug 1 17:37:54 2008 +0200 ACPI: video: Ignore devices that aren't present in hardware I have been waiting for in-tree inclusion to submit patches for toshiba_acpi against stable base. --nextPart8633294.OmLpcteX02 Content-Type: application/pgp-signature; name=signature.asc Content-Description: This is a digitally signed message part. -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (GNU/Linux) iEYEABECAAYFAkkHPDYACgkQR6LMutpd94zxBQCeIZwuhYC1aDJZ/qfGz0aaaDK8 vCoAn26UY6+C//0oC4K1DbNVjxdoS5Th =q83M -----END PGP SIGNATURE----- --nextPart8633294.OmLpcteX02-- -- 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/