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Date:      Sun, 1 Feb 2015 10:18:21 +0100
From:      Lars Engels <lars.engels@0x20.net>
To:        Miguel Clara <miguelmclara@gmail.com>
Cc:        Alexandr Krivulya <shuriku@shurik.kiev.ua>, freebsd-current <freebsd-current@freebsd.org>
Subject:   Re: drm2 regression: backlight adjustment on ivybridge no longer works
Message-ID:  <20150201091821.GN41565@e-new.0x20.net>
In-Reply-To: <CADGo8CVuDLVUD26Xfr1j=nEQ%2B5q4ByfYC8EK4XYTm=sNvab3pA@mail.gmail.com>
References:  <CAJ-VmomfBrBN6HVBq5FoRf1nRqvrhiDOw6RHjfs13j-9cqi1vg@mail.gmail.com> <CACyC=qYMT3VFx4GxypJ6F61pKSaxE0JKBK%2BudDMPSh4_ASAi6w@mail.gmail.com> <000e01d039fb$d5959930$80c0cb90$@Wilcox-Tech.com> <CACyC=qZeG8L%2BbZu=RacU_rdNVTFhyCFH2A%2BdNw71%2B09cZ20VgA@mail.gmail.com> <009501d03acb$4f380d70$eda82850$@Wilcox-Tech.com> <CAJ-Vmokph=BHH895uHxQh=dHPfb5_ik4MZrq8sOGrd0AtPzymQ@mail.gmail.com> <CAJ-Vmom3gLa_2EoviL0Ck2B36Bpa-3P58%2BUp5rsLFaH-NS4ExQ@mail.gmail.com> <CACyC=qZJZw0DNWO%2BUd_pq_4V4d4A6yMnDF%2BwVqPgt1mg1txJWg@mail.gmail.com> <54CA7949.6060202@shurik.kiev.ua> <CADGo8CVuDLVUD26Xfr1j=nEQ%2B5q4ByfYC8EK4XYTm=sNvab3pA@mail.gmail.com>

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On Sat, Jan 31, 2015 at 07:11:23AM +0000, Miguel Clara wrote:
> On the laptop I'm running current, if relevant
>=20
> Loading acpi_video doesn't do much....  I don't see any sysctl related to
> "lcd0" or "birightness", this is one of those computers with "hybrid"
> graphics, intel + ATI card, so not sure if that's somewhat related.
>=20
>=20
> Anyway, I've just tested the drm patches (both) and intelbacklight (
> https://github.com/grembo/intel_backlight_fbsd) compiles, installs and ru=
ns
> fine!
>=20
> So thanks both for the patches.

On my X230 I also lost the ability to control brightness with Fn+F8 /
Fn+F9.
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?

Changing brightness with hw.acpi.video.lcd0.brightness doesn't work.

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