Re: Brightness 100% when connect or disconnect charger

In message <745ddec4-e2eb-48a6-a903-33821e80d73a@gmail.com>, Jason Bacon 
writes
:
> On 11/9/23 10:13, Cy Schubert wrote:
> > In message <20231109091931.983f45f8fad4305569faddcb@bidouilliste.com>,
> > Emmanuel
> >   Vadot writes:
> >> On Wed, 8 Nov 2023 21:57:21 +0200
> >> "Dr. Amr Osman" <dr3mro@gmail.com> wrote:
> >>
> >>> Hello,
> >>> I have installed freeBSD 14rc4 on Lenovo Thinkpad x270 and xfce desktop a
> nd
> >>> when I
> >>> 1) connect the charger
> >>> 2) disconnect the charger
> >>> 3) resume from suspend
> >>> The LCD brightness is 100% which is really disturbing specially when I am
> >>> in dark room
> >>
> >>   I don't have the issue on my Thinkpad X390 with suspend/resume but I
> >> do have it with the charger.
> >>   I'm pretty sure that it's a hardware thing and we can't do anything
> >> about it without having some framework for sensors that can handle
> >> power supply connection/disconnection and events.
> >>
> >>> hw.acpi.video.lcd0.economy: 20
> >>> hw.acpi.video.lcd0.fullpower: 30
> >>> I have loaded acpi_video and acpi_ibm
> >>> and if I tried to adjust brightness it goes suddenly from 100 to 20 if I
> >>> press fn +f5/f6
> >>
> >>   You shouldn't need to load acpi_video on modern laptop, backlight(9)
> >> and backlight(8) is enought (if you have drm loaded).
> > 
> > What I'm about to discuss is not a backlight issue but a unplug the power
> > supply and plug it back in issue on my Acer 4752.
> > 
> > When 9a4bc5208fad (acpica: Import ACPICA 20221020) was committed, WOL no
> > longer worked on my Acer 4752.
> > 
> > Howerver after I unplugged it from the power supply and plugged it back in,
> > only then would it recognize the WOL packet. This was a regression in
> > 9a4bc5208fad. (I did create a local patch to revert part of 9a4bc5208fad.)
> > 
> > Probably not a FreeBSD issue per se but acpica contrib issue.
> > 
> > 
>
> Just to be thorough, is the BIOS fully up-to-date?

For my semi-related problem. Yes.


-- 
Cheers,
Cy Schubert <Cy.Schubert@cschubert.com>
FreeBSD UNIX:  <cy@FreeBSD.org>   Web:  https://FreeBSD.org
NTP:           <cy@nwtime.org>    Web:  https://nwtime.org

			e^(i*pi)+1=0