Date: Tue, 31 Jan 2023 13:55:26 +0100 From: Emmanuel Vadot <manu@bidouilliste.com> To: "Poul-Henning Kamp" <phk@phk.freebsd.dk> Cc: Oleksandr Kryvulia <shuriku@shurik.kiev.ua>, freebsd-current@freebsd.org Subject: Re: Could not change brightness anymore with i915kms & acpi_video modules c 202211 Message-ID: <20230131135526.a3e96ee0ac8479521a99514b@bidouilliste.com> In-Reply-To: <202301311233.30VCX2qX079924@critter.freebsd.dk> References: <CABObuOoUDHrUF6FyTwEXTrnt3ztkoAR4x5vzjcNp7H-4F4XE7A@mail.gmail.com> <6a997703-6f13-716d-d38d-1a2b910d52ec@shurik.kiev.ua> <202301311233.30VCX2qX079924@critter.freebsd.dk>
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On Tue, 31 Jan 2023 12:33:02 +0000 "Poul-Henning Kamp" <phk@phk.freebsd.dk> wrote: > -------- > Oleksandr Kryvulia writes: > > > Does backlight(8) works for you? > > Speaking of backlight(8): On my T14s, I see the following: > > If I set the light with backlight(8) to something, say 30%, and then > change the power-situation, for instance by unplugging the charger, > the backlight goes up to 100%. > > If I then try to set it back to 30% with backlight(8), nothing happens. > > If I use any other value, for instance 31%, backlight(8) does the job. > > I guess somewhere some code says "It's always 30%, just return" ? > > This might be a bit confusing if you have the intensity encoded in > some script, which then "sometimes does not work"... Smells like https://cgit.freebsd.org/src/commit/sys/dev/backlight/backlight.c?id=e26ef41f79902991c772b59927c721aa7fa5fc64 It's not in 13.1 but will be in 13.2 > > -- > Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 > phk@FreeBSD.ORG | TCP/IP since RFC 956 > FreeBSD committer | BSD since 4.3-tahoe > Never attribute to malice what can adequately be explained by incompetence. > -- Emmanuel Vadot <manu@bidouilliste.com> <manu@FreeBSD.org>
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