[Bug 227869] Backlight brightness media keys are not working on Lenovo B570e (although backlight brightness can be controlled via intel_backlight)

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=227869

Alexey Dokuchaev <danfe at FreeBSD.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |danfe at FreeBSD.org
             Status|New                         |Open

--- Comment #5 from Alexey Dokuchaev <danfe at FreeBSD.org> ---
> is there any chance to see this exposed to sysctl in the future without needing
> this kludge? [...] I have tried loading different acpi_* kernel modules, and
> none of them work.
On the Lenovo L470 here and fairly recent -CURRENT I can control brightness
with sysctl(8) after loading acpi_video(4) module.  Also, as of base r360025
brightness change events are visible via devd(8):

> # sysctl hw.acpi.video.lcd0.brightness=85
> hw.acpi.video.lcd0.brightness: 60 -> 85
> 
> $ cat /var/run/devd.pipe
> 
> !system=ACPI subsystem=Video type=brightness notify=85
Your report was against 11.1-RELEASE which is no longer supported.  Could you
please update to contemporary, supported FreeBSD version and reconduct your
tests?

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