Date: Fri, 17 Apr 2020 10:10:49 -0600 From: Warner Losh <imp@bsdimp.com> To: Colin Percival <cperciva@freebsd.org> Cc: Alexey Dokuchaev <danfe@freebsd.org>, Oliver Pinter <oliver.pntr@gmail.com>, "svn-src-head@freebsd.org" <svn-src-head@freebsd.org>, "svn-src-all@freebsd.org" <svn-src-all@freebsd.org>, "src-committers@freebsd.org" <src-committers@freebsd.org> Subject: Re: svn commit: r360025 - head/sys/dev/acpica Message-ID: <CANCZdfqoobNQ7_MmuBTKRx9myof2SSZuidHScycqEChLcQT56A@mail.gmail.com> In-Reply-To: <c9a1df21-761c-a6a4-f097-7f14acdbda4b@freebsd.org> References: <202004162156.03GLuqgw058432@repo.freebsd.org> <CAPjTQNEFpKXE6QQUdR5dh3eHtmcVXfqOHW9JvdrhtPNrhGN=kA@mail.gmail.com> <b8a9b1cf-720e-dc42-ccc3-fee0ff584bda@freebsd.org> <20200417062636.GC24371@FreeBSD.org> <c9a1df21-761c-a6a4-f097-7f14acdbda4b@freebsd.org>
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On Fri, Apr 17, 2020 at 9:54 AM Colin Percival <cperciva@freebsd.org> wrote: > On 2020-04-16 23:26, Alexey Dokuchaev wrote: > > On Thu, Apr 16, 2020 at 03:12:15PM -0700, Colin Percival wrote: > >> On 2020-04-16 15:05, Oliver Pinter wrote: > >>> On Thursday, April 16, 2020, Colin Percival <cperciva@freebsd.org > >>> <mailto:cperciva@freebsd.org>> wrote: > >>> Log: > >>> Alert devd when acpi_video brightness changes > >>> > >>> Please add this to release notes! > >> > >> I considered that, but so far I don't have any evidence that other > >> systems exist with the same half-working ACPI. Unless you're aware of > >> people who are seeing the same "hw.apci.video.lcd0.brightness changes > >> but thebacklight doesn't" syndrome? > > > > So this is more like a work-around for the problem which lies elsewhere: > > something is missing in acpi_video(4) or perhaps we need a (nonexistent) > > acpi_dell(4)? In this case, shouldn't it be disabled by default, or at > > least be toggable since as you say, evidently just a minority of systems > > exist with the same half-working ACPI? > > Having occasional extra messages coming through devctl(4) is harmless; by > default devd will just drop them on the floor since there isn't anything > configured to do with them. > > In an upcoming change to the graphics/intel-backlight port (if/when someone > merges my patch into their github repo...) I'll be providing a > configuration > file which can be copied into /usr/local/etc/devd/ in order to hook these > messages up to the intel-backlight utility. > > So... yes, for practical purposes this is disabled by default. > There's no harm to these, so I agree... there may also be some novel uses :) Warner > -- > Colin Percival > Security Officer Emeritus, FreeBSD | The power to serve > Founder, Tarsnap | www.tarsnap.com | Online backups for the truly paranoid >
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