Date: Fri, 16 Aug 2024 19:30:21 -0400 From: LuMiWa <lumiwa@dismail.de> To: freebsd-acpi@freebsd.org Subject: Re: acpi_ibm brightness man page example not working + fix Message-ID: <20240816193021.57d16978@dismail.de> In-Reply-To: <D3HPEMO28LSQ.3B2FYGFSMSFDB@mccd.space> References: <D3HPEMO28LSQ.3B2FYGFSMSFDB@mccd.space>
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On Fri, 16 Aug 2024 17:53:38 -0500
"Marc Coquand" <marc@mccd.space> wrote:
> Hi!
>=20
> Apologize in advance if I'm reporting this wrong, this is my first
> post to the mailing list and my first time contributing to Freebsd. :)
>=20
> I noticed that the example in the manpage for acpi_ibm, specifically
> for setting up brightness was not working for me. The specific part
> that did not work for me is:
>=20
> + 0x10|0x11)
> + LEVEL=3D`sysctl -n dev.acpi_${OEM}.0.lcd_brightness`
> + PERCENT=3D`${ECHO} "${BC_PRECOMMANDS} ; \
> + ${LEVEL} / ${MAX_LCD_BRIGHTNESS} * 100" |\
> + ${CALC} | ${CUT} -d . -f 1`
> + MESSAGE=3D"brightness level ${PERCENT}%"
> + ;;
> +
>=20
> This was tested on my Thinkpad T480s. It makes sense that it would not
> work, because manually changing the brightness with `sysctl
> dev.acpi_ibm.0.lcd_brightness=3DXXX` did not do anything either on my
> laptop.
>=20
> Since FreeBSD 13.0, there is a new backlight utility, and with that I
> was able to fix backlight on my computer by simply creating the
> following devd config:
>=20
> /etc/devd/acpi_ibm_brightness.conf
> + notify 20 {
> + match "system" "ACPI";
> + match "subsystem" "IBM";
> + match "notify" "0x10";
> + action "/usr/bin/backlight incr 10";
> + };
> +
> + notify 20 {
> + match "system" "ACPI";
> + match "subsystem" "IBM";
> + match "notify" "0x11";
> + action "/usr/bin/backlight decr 10";
> + };
>=20
> Maybe the examples in acpi_ibm manpages should use backlight utility
> instead?
>=20
> Alternatively, maybe the devd rules above could be added by default so
> that backlight works out of the box if you load acpi_ibm? It'd be easy
> to also add support for volume control with mixer. I am happy to make
> a patch if this is of interest.
>=20
> Sincerely,
> Marc
>=20
The same problem is on Thinkpad T495.=20
I am using script from:
https://forums.freebsd.org/threads/backlight.94548/
--=20
=E2=80=9CI hate books; they only teach us to talk about things we know noth=
ing
about.=E2=80=9D
=E2=80=95 Jean-Jacques Rousseau=20
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