From owner-freebsd-current@FreeBSD.ORG Mon Feb 2 19:29:00 2015 Return-Path: Delivered-To: freebsd-current@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [8.8.178.115]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by hub.freebsd.org (Postfix) with ESMTPS id 831D54ED for ; Mon, 2 Feb 2015 19:29:00 +0000 (UTC) Received: from mail.0x20.net (mail.0x20.net [217.69.76.211]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id DBC4B7B1 for ; Mon, 2 Feb 2015 19:28:59 +0000 (UTC) Received: from e-new.0x20.net (mail.0x20.net [IPv6:2001:aa8:fffb:1::3]) (using TLSv1 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) by mail.0x20.net (Postfix) with ESMTPS id E9C476A6077; Mon, 2 Feb 2015 20:28:55 +0100 (CET) Received: from e-new.0x20.net (localhost [127.0.0.1]) by e-new.0x20.net (8.14.7/8.14.7) with ESMTP id t12JSt8G098705; Mon, 2 Feb 2015 20:28:55 +0100 (CET) (envelope-from lars@e-new.0x20.net) Received: (from lars@localhost) by e-new.0x20.net (8.14.7/8.14.7/Submit) id t12JStgH098491; Mon, 2 Feb 2015 20:28:55 +0100 (CET) (envelope-from lars) Date: Mon, 2 Feb 2015 20:28:54 +0100 From: Lars Engels To: Alexandr Krivulya , Andrew Wilcox , "'freebsd-current'" Subject: Re: drm2 regression: backlight adjustment on ivybridge no longer works Message-ID: <20150202192854.GV41565@e-new.0x20.net> Mail-Followup-To: Lars Engels , Alexandr Krivulya , Andrew Wilcox , 'freebsd-current' References: <54CA7949.6060202@shurik.kiev.ua> <20150201091821.GN41565@e-new.0x20.net> <004001d03e02$62d7f040$2887d0c0$@Wilcox-Tech.com> <20150201094124.GO41565@e-new.0x20.net> <20150201101201.GP41565@e-new.0x20.net> <54CDFDEA.2010209@shurik.kiev.ua> <3bafb094-e87c-4c3b-adfe-a36f1cf89302@email.android.com> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="D/26AIznG/rf8cgR" Content-Disposition: inline In-Reply-To: <3bafb094-e87c-4c3b-adfe-a36f1cf89302@email.android.com> X-Editor: VIM - Vi IMproved 7.4 X-Operation-System: FreeBSD 8.4-RELEASE-p23 User-Agent: Mutt/1.5.23 (2014-03-12) X-BeenThere: freebsd-current@freebsd.org X-Mailman-Version: 2.1.18-1 Precedence: list List-Id: Discussions about the use of FreeBSD-current List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 02 Feb 2015 19:29:00 -0000 --D/26AIznG/rf8cgR Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: quoted-printable On Sun, Feb 01, 2015 at 11:23:47AM +0100, Lars Engels wrote: > On 1. Februar 2015 11:20:26 MEZ, Alexandr Krivulya wrote: > >01.02.2015 12:12, Lars Engels =D0=BF=D0=B8=D1=88=D0=B5=D1=82: > >> On Sun, Feb 01, 2015 at 10:41:25AM +0100, Lars Engels wrote: > >>> On Sun, Feb 01, 2015 at 03:35:15AM -0600, Andrew Wilcox wrote: > >>>> Lars Engels sent: 01 February 2015 03:18: > >>>>> With acpi_video I get some interesting sysctl: > >>>>> hw.acpi.video.lcd0.levels: 100 100 0 1 2 3 4 5 6 7 8 9 10 11 12 13 > >14 15 > >>>>> 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 > >38 39 > >>>>> 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 > >62 63 > >>>>> 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 > >86 87 > >>>>> 88 89 90 91 92 93 94 95 96 97 98 99 100 > >>>>> > >>>>> I guess it should not be 100 100 0 ... 100? > >>>> Actually, the "standard" internal ACPI brightness level struct > >(BRTN in the DSDT) is laid out as: > >>>> > >>>> * "Full power" value (one byte, the value at which the brightness > >should be set on AC by default) > >>>> * "Economy" value (one byte, the value at which the brightness > >should be set on battery by default) > >>>> * Actual values (N bytes, up to Max but frequently not) > >>>> > >>>> So, no, that value indeed sounds correct. On my laptop the value > >is: > >>>> 80 47 0 7 13 20 27 33 40 47 53 60 67 73 80 87 93 100 > >>> Thank you for the explanation. > >>> FWIW, here is the full output from sysctl hw.acpi.video.lcd0: > >>> > >>> hw.acpi.video.lcd0.active: 1 > >>> hw.acpi.video.lcd0.brightness: 11 > >>> hw.acpi.video.lcd0.fullpower: 100 > >>> hw.acpi.video.lcd0.economy: 100 > >>> hw.acpi.video.lcd0.levels: 100 100 0 1 2 3 4 5 6 7 8 9 10 11 12 13 > >14 15 > >>> 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 > >39 > >>> 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 > >63 > >>> 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 > >87 > >>> 88 89 90 91 92 93 94 95 96 97 98 99 100 > >>> hw.acpi.video.crt0.active: 1 > >>> hw.acpi.video.ext0.active: 1 > >>> hw.acpi.video.ext1.active: 1 > >>> hw.acpi.video.ext2.active: 1 > >>> hw.acpi.video.ext3.active: 1 > >>> hw.acpi.video.ext4.active: 1 > >>> hw.acpi.video.ext5.active: 1 > >>> > >>>> What revision of -CURRENT are you running? What is the outcome of > >>>> trying the patch posted Saturday morning (UTC) from Elizabeth Myers > >>>> (message ID <54CC5311.9070604@interlinked.me>)? > >>>> > >>> I'm currently running r277858 and haven't tried the patch, yet. But > >will > >>> do now and report back. > >>> > >> So now I have a new sysctl hw.dri.0.i915_backlight. But no matter > >what > >> value I pass to it, the brightness doesn't change. > >> > >> It's a Ivy Brigde notebook where drm shows some errors in dmesg. > >Please > >> see: http://pastie.org/9877917 > >> > >> > > > >Please try to boot with acpi_ibm and without acpi_video. This way all > >works for me. >=20 > That=E2=80=98s already what I do. Also tried it with acpi_video without l= uck. For the records: With r278102 brightness controls are working again. 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