linux-kernel - Re: 2.6.30-rc1 (latest git): thinkpad-acpi: cannot control brightness with hotkeys

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Date:	Sun, 12 Apr 2009 00:39:43 +0200
From:	Arkadiusz Miskiewicz <a.miskiewicz@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Niel Lambrechts <niel.lambrechts@...il.com>,
	Henrique de Moraes Holschuh <hmh@....eng.br>
Subject: Re: 2.6.30-rc1 (latest git): thinkpad-acpi: cannot control brightness with hotkeys

On Sunday 12 of April 2009, Arkadiusz Miskiewicz wrote:
> On Saturday 11 of April 2009, Niel Lambrechts wrote:
> > Hi there,
> >
> > With latest git kernel, I'm no longer able to control my Thinkpad (W500)
> > brightness, although I can still control the backlight, bluetooth etc.
>
> Same problem here (but no warning) on T400. I wasn't able to get it
> working. Tried using different values (0, 1,2, 3) for brightness_mode
> without success.

The more interesting is that brightness control starts working after I suspend 
to ram and resume.

Possibly related line logged after resume:
[ 8579.660535] ACPI: EC: non-query interrupt received, switching to interrupt 
mode
-- 
Arkadiusz Miśkiewicz        PLD/Linux Team
arekm / maven.pl            http://ftp.pld-linux.org/

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