From owner-freebsd-current@FreeBSD.ORG Sun Feb 1 10:23:52 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 CE8641A9 for ; Sun, 1 Feb 2015 10:23:52 +0000 (UTC) Received: from mail.0x20.net (mail.0x20.net [IPv6:2001:aa8:fffb:1::3]) (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 5D4ED1FA for ; Sun, 1 Feb 2015 10:23:51 +0000 (UTC) Received: from [IPV6:2001:67c:1810:f0ff:fd75:299c:2c8a:4c28] (unknown [IPv6:2001:67c:1810:f0ff:fd75:299c:2c8a:4c28]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) (Authenticated sender: lala) by mail.0x20.net (Postfix) with ESMTPSA id BE98B6A6064; Sun, 1 Feb 2015 11:23:49 +0100 (CET) User-Agent: Kaiten Mail In-Reply-To: <54CDFDEA.2010209@shurik.kiev.ua> References: <009501d03acb$4f380d70$eda82850$@Wilcox-Tech.com> <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> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Subject: Re: drm2 regression: backlight adjustment on ivybridge no longer works From: Lars Engels Date: Sun, 01 Feb 2015 11:23:47 +0100 To: Alexandr Krivulya , Andrew Wilcox , 'freebsd-current' Message-ID: <3bafb094-e87c-4c3b-adfe-a36f1cf89302@email.android.com> 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: Sun, 01 Feb 2015 10:23:53 -0000 On 1. Februar 2015 11:20:26 MEZ, Alexandr Krivulya wrote: >01.02.2015 12:12, Lars Engels пишет: >> 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. That‘s already what I do. Also tried it with acpi_video without luck.