From owner-freebsd-questions@freebsd.org  Mon Feb  5 23:56:14 2018
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To: freebsd-questions@freebsd.org
From: Per olof Ljungmark <peo@nethead.se>
Subject: Anyone knows how to control backlight on a Thinkpad T520 ?
Message-ID: <05cd30aa-6064-b5ab-e56e-424c4a9d803c@nethead.se>
Date: Tue, 6 Feb 2018 00:46:47 +0100
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It worked with the Fn+<Home><End> on the former TP's I had but not this 
one. It's getting a little old but I love the keyboard and the Nvidia 
graphics.

FreeBSD 11.1-STABLE

Thanks!