linux-kernel - Re: regression since 2.6.36: backlight in sony-laptop not working

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Message-ID: <20101112101008.GC6726@gamma.logic.tuwien.ac.at>
Date:	Fri, 12 Nov 2010 19:10:08 +0900
From:	Norbert Preining <preining@...ic.at>
To:	Zhang Rui <rui.zhang@...el.com>
Cc:	Matthew Garrett <mjg59@...f.ucam.org>,
	Mattia Dongili <malattia@...ux.it>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	ACPI Devel Mailing List <linux-acpi@...r.kernel.org>
Subject: Re: regression since 2.6.36: backlight in sony-laptop not working

Hi Zhang,

On Fr, 12 Nov 2010, Zhang Rui wrote:
> I think the /sys/class/thermal/ and /sys/class/backlight/acpi_video0
> still exists, right?

Yes, right.

> we make ACPI video procfs I/F depend on CONFIG_ACPI_PROCFS, which is
> cleared by default, in 2.6.36, and removed this I/F in 2.6.37-rc1.
> perhaps the backlight control depends on the procfs I/F?

Hmm, I would have expected that the backlight adjustment reacts to the
key sent, as I can use xbacklight by hand, and that is old.

Best wishes

Norbert
------------------------------------------------------------------------
Norbert Preining            preining@...ist.ac.jp, logic.at, debian.org}
JAIST, Japan                                 TeX Live & Debian Developer
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