linux-kernel - [v3.20] ACPI backlight problem

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Message-ID: <CADDKRnDuC8y_shfPEBcBnxg3BXzwMyv0AUhEsYcSUx8a9-mXsg@mail.gmail.com>
Date:	Sun, 22 Feb 2015 17:53:11 +0100
From:	Jörg Otte <jrg.otte@...il.com>
To:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	"Rafael J. Wysocki" <rafael.j.wysocki@...el.com>,
	ACPI Devel Maling List <linux-acpi@...r.kernel.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>
Subject: [v3.20] ACPI backlight problem

When I press backlight keys then normally OSD is shown and
backlight follows immediately the keystrokes step by step.

Now in v3.20 it behaves different:
When I press backlight keys at first nothing happens. If I watch a
video it is being stopped.
After some seconds OSD is shown, backlight changes - in one step - to
the new level and video continues.

Thanks, Jörg
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