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

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Date:	Fri, 12 Nov 2010 12:50:27 +0900
From:	Norbert Preining <preining@...ic.at>
To:	Matthew Garrett <mjg59@...f.ucam.org>
Cc:	Mattia Dongili <malattia@...ux.it>, 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

On Fr, 12 Nov 2010, Matthew Garrett wrote:
> > Seems so that the sys files have changed to new locations:
> > /sys/devices/virtual/backlight/acpi_video0/brightness
> > 
> > (mind the additional "virtual")
> > as well as thermal zone etc etc.
> > 
> > Could that explain the problem?
> 
> Only if you have some wonderfully badly written software. What are you 
> using to control the backlight? Also, I'd note that in this case your 
> backlight is controlled via ACPI, not sony-laptop.

Ah right, yes, so probabyl sony-laptopt has nothing to do with it.

THen the problem is simply that the acpi events are not coming through
when pressing the respective keys.

But *that* might be part of the sony-laptop kernel module?

Best wishes

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