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

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Message-ID: <21928294.T4sOdDMpFC@vostro.rjw.lan>
Date:	Tue, 24 Feb 2015 00:18:41 +0100
From:	"Rafael J. Wysocki" <rjw@...ysocki.net>
To:	Jörg Otte <jrg.otte@...il.com>
Cc:	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: Re: [v3.20] ACPI backlight problem

On Sunday, February 22, 2015 05:53:11 PM Jörg Otte wrote:
> When I press backlight keys then normally OSD is shown and
> backlight follows immediately the keystrokes step by step.

That's how it works in 3.19, right?

> 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.

So what machine is that?

Rafael

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