linux-kernel - Screen brightness adjustment is just too broken

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Message-ID: <55EB1B76.1070601@saunalahti.fi>
Date:	Sat, 5 Sep 2015 19:42:30 +0300
From:	Joonas Saarinen <jza@...nalahti.fi>
To:	linux-kernel@...r.kernel.org
Subject: Screen brightness adjustment is just too broken

Hi!

To me it looks like the screen brightness adjustment is a bit messy in 
Linux. If I install Ubuntu or Linux Mint on any laptop, I usually get 2 
brightness steps with one keypress (with some machines even 3). I 
believe this is because the brightness adjustment is handled by multiple 
listeners (for example, the ACPI interface, GPU driver and, internally 
by BIOS).

Are there plans to eventually fix this behavior?

Joonas Saarinen
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