Date: Thu, 4 Jul 2024 16:02:34 -0700 From: Kevin Oberman <rkoberman@gmail.com> To: Anton Shepelev <anton.txt@gmail.com> Cc: freebsd-stable@freebsd.org Subject: Re: Need help controlling laptom display brightness via sysctl Message-ID: <CAN6yY1uo%2Be6pY1H7JSyHKjjbB8O6a_UAoW=NoagzXSCc%2BHzaHQ@mail.gmail.com> In-Reply-To: <20240705005834.4c7983ea29da3af8f8e36718@gmail.com> References: <20240704010029.75608a4e49205eb38a6034be@gmail.com> <20240705005834.4c7983ea29da3af8f8e36718@gmail.com>
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On Thu, Jul 4, 2024 at 2:59=E2=80=AFPM Anton Shepelev <anton.txt@gmail.com>=
wrote:
> I wrote:
>
> > I need your help in setting up the brightness control on
> > HP 15-b0xx laptop via sysctl.
>
> I was infored that this ability has been discountinued in
> favour of the backlight utility, so I gave up and wrote the
> following devd rule:
>
> notify 10
> { match "system" "ACPI" ;
> match "subsystem" "Video" ;
> match "type" "brightness" ;
> action "/usr/bin/backlight $notify"; };
>
> This changes brightness by tiny 1/100 steps, but this is
> by desing of the HP engineers...
>
> References:
> 1. https://man.freebsd.org/cgi/man.cgi?query=3Ddevd.conf
> 2.
> https://www.davidschlachter.com/misc/freebsd-acpi_video-thinkpad-display-=
brightness
>
> This is what I used. I have it in /etc/devd/thinkpad.conf. You might use
HP.conf:
notify 100 {
match "system" "ACPI";
match "subsystem" "ACAD";
match "notify" "0x00";
action "/usr/bin/backlight 40; service power_profile $notify";
};
notify 100 {
match "system" "ACPI";
match "subsystem" "ACAD";
match "notify" "0x01";
action "/usr/bin/backlight 100; service power_profile $notify";
};
notify 100 {
match "system" "ACPI";
match "subsystem" "IBM";
match "notify" "0x10";
action "/usr/bin/backlight +";
};
notify 100 {
match "system" "ACPI";
match "subsystem" "IBM";
match "notify" "0x11";
action "/usr/bin/backlight -";
};
10% changes are more reasonable than 1%. The top two "notify"s set the
screen at 100% on AC and 40% on battery.
--=20
Kevin Oberman, Part time kid herder and retired Network Engineer
E-mail: rkoberman@gmail.com
PGP Fingerprint: D03FB98AFA78E3B78C1694B318AB39EF1B055683
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<div dir=3D"ltr"><div dir=3D"ltr"><div class=3D"gmail_default" style=3D"fon=
t-family:tahoma,sans-serif;font-size:small">On Thu, Jul 4, 2024 at 2:59=E2=
=80=AFPM Anton Shepelev <<a href=3D"mailto:anton.txt@gmail.com">anton.tx=
t@gmail.com</a>> wrote:</div></div><div class=3D"gmail_quote"><blockquot=
e class=3D"gmail_quote" style=3D"margin:0px 0px 0px 0.8ex;border-left:1px s=
olid rgb(204,204,204);padding-left:1ex">I wrote:<br>
<br>
> I need your help in setting up the brightness control on<br>
> HP 15-b0xx laptop via sysctl.<br>
<br>
I was infored that this ability has been discountinued in<br>
favour of the backlight utility, so I gave up and wrote the<br>
following devd rule:<br>
<br>
notify 10<br>
{=C2=A0 =C2=A0 =C2=A0 =C2=A0match=C2=A0 "system"=C2=A0 =C2=A0 &qu=
ot;ACPI"=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 ;<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 match=C2=A0 "subsystem" "Video&q=
uot;=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0;<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 match=C2=A0 "type"=C2=A0 =C2=A0 =C2=
=A0 "brightness"=C2=A0 =C2=A0 ;<br>
=C2=A0 =C2=A0 =C2=A0 =C2=A0 action "/usr/bin/backlight $notify";=
=C2=A0 };<br>
<br>
This changes brightness by tiny 1/100 steps, but this is<br>
by desing of the HP engineers...<br>
<br>
References:<br>
1. <a href=3D"https://man.freebsd.org/cgi/man.cgi?query=3Ddevd.conf" rel=3D=
"noreferrer" target=3D"_blank">https://man.freebsd.org/cgi/man.cgi?query=3D=
devd.conf</a><br>
2. <a href=3D"https://www.davidschlachter.com/misc/freebsd-acpi_video-think=
pad-display-brightness" rel=3D"noreferrer" target=3D"_blank">https://www.da=
vidschlachter.com/misc/freebsd-acpi_video-thinkpad-display-brightness</a><b=
r>
<br></blockquote><div><span class=3D"gmail_default" style=3D"font-family:ta=
homa,sans-serif;font-size:small">This is what I used. I have it in /etc/dev=
d/thinkpad.conf. You might use HP.conf:<br></span></div><div>notify 100 {<b=
r>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0match "system" =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0"ACPI";<br>=C2=A0=
=C2=A0 =C2=A0 =C2=A0 =C2=A0match "subsystem" =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 "ACAD";<br>=C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0match "notify" =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0"0x00";<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0=
=C2=A0action "/usr/bin/backlight 40; service power_profile $notify&qu=
ot;;<br>=C2=A0};<br><br>notify 100 {<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0m=
atch "system" =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0"ACPI";<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0match &=
quot;subsystem" =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 "=
;ACAD";<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0match "notify" =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0"0x01&qu=
ot;;<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0action "/usr/bin/backlight 1=
00; service power_profile $notify";<br>};<br><br>notify 100 {<br>=C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0match "system" =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0"ACPI";<br>=C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0match "subsystem" =C2=A0 =C2=A0 =C2=A0=
=C2=A0 =C2=A0 =C2=A0 =C2=A0 "IBM";<br>=C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0match "notify" =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0"0x10";<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0action "/usr/bin/backlight +";<br>};<br><br>notify 100 {<br=
>=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0match "system" =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0"ACPI";<br>=C2=A0=
=C2=A0 =C2=A0 =C2=A0 =C2=A0match "subsystem" =C2=A0 =C2=A0 =C2=
=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 "IBM";<br>=C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0match "notify" =C2=A0 =C2=A0 =C2=A0 =C2=A0 =C2=A0 =
=C2=A0 =C2=A0 =C2=A0 =C2=A0"0x11";<br>=C2=A0 =C2=A0 =C2=A0 =C2=A0=
=C2=A0action "/usr/bin/backlight -";<br>};<br></div><div><br></d=
iv><div><div style=3D"font-family:tahoma,sans-serif;font-size:small" class=
=3D"gmail_default">10% changes are more reasonable than 1%. The top two &qu=
ot;notify"s set the screen at 100% on AC and 40% on battery.<br></div>=
</div></div><span class=3D"gmail_signature_prefix">-- </span><br><div dir=
=3D"ltr" class=3D"gmail_signature"><div dir=3D"ltr"><div><div dir=3D"ltr"><=
div><div dir=3D"ltr"><div><div dir=3D"ltr">Kevin Oberman, Part time kid her=
der and retired Network Engineer<br>E-mail: <a href=3D"mailto:rkoberman@gma=
il.com" target=3D"_blank">rkoberman@gmail.com</a><br></div><div>PGP Fingerp=
rint: D03FB98AFA78E3B78C1694B318AB39EF1B055683</div></div></div></div></div=
></div></div></div></div>
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