Story of a laptop user

[Warren Block]

On Wed, 5 Feb 2014, Eitan Adler wrote:

> On Wed, Feb 5, 2014 at 1:25 PM, Adrian Chadd <adrian at freebsd.org> wrote:
>> hi,
>>
>> Try (if I'm reading your dump correctly):
>>
>> _SB.PCI0.PEG0.VGA.LCD._BCM
>> _SB.PCI0.PEG1.VGA.LCD._BCM
>> _SB.PCI0.GFX0.DD02._BCM
>>
>> .. god I wish we had a way to actually just dump the tree in a useful
>> fashion to inspect what objects there are.
>>
>> Anyway, do the acpi_call hacks to various nodes that have _BCM in them
>> and see if setting any of them changes your brightness.
>
> Nothing here changed the screen brightness. If you have another
> suggestion i'd be happy to try it.

Not ACPI, but maybe a way that will work:
https://forums.freebsd.org/viewtopic.php?f=12&t=44146&p=249316