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Subject: Thinkpad T450: can't change display backlight
To: "freebsd-acpi@freebsd.org" <freebsd-acpi@freebsd.org>, lists@olivarim.com
From: Juan =?iso-8859-1?b?UmFt824=?= Molina Menor <listjm@club.fr>
Message-ID: <577BC459.6070406@club.fr>
Date: Tue, 5 Jul 2016 16:29:45 +0200
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> Hi,
>    
> I just bought a Lenovo Thinkpad T450 laptop and installed FreeBSD on top of it.
> It runs fine except I'm not able to change the display backlight. The laptop embeds
> a Core i5-5300U CPU with an Intel Graphics 5500 adapter (Broadwell). I know the adapter
> is not yet supported, but I hoped to have backlight control working anyway!

The FreeBSD Desktop project has made substantial progress in Broadwell 
support. You should start here:
https://github.com/FreeBSDDesktop/freebsd-base-graphics/wiki

Good luck!
Juan