Re: Brightness 100% when connect or disconnect charger

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 and
>>> 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?

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