From: Julien BLACHE <jb@jblache.org>
To: Soeren Sonnenburg <sonne@debian.org>
Cc: mjg@redhat.com, nicolas@boichat.ch, felipe_alfaro@linuxmail.org,
Linux Kernel <linux-kernel@vger.kernel.org>
Subject: Re: Brightness control for MacBook Pro - Nvidia 9400
Date: Fri, 12 Feb 2010 12:18:28 +0100 [thread overview]
Message-ID: <878wayk8hn.fsf@sonic.technologeek.org> (raw)
In-Reply-To: <1265920725.7103.7.camel@no> (Soeren Sonnenburg's message of "Thu, 11 Feb 2010 21:38:45 +0100")
Soeren Sonnenburg <sonne@debian.org> wrote:
Hi,
> I am booting a MacBookPro5,3 using elilo and efifb. Now I'd like to use
> pommed to control display brightness (which won't work). Digging around
> in mbp_nvidia_bl.c I figured out that tries to control the geforce 9600M
> instead of the currently active geforece 9400m
If you know how one can determine which GPU is active, let me know. I
don't have this information at the moment.
> Does anyone have an idea which bytes to tweak to change brightness
> levels for the 9400? Seems like 0x52f does not work - at least
> setpci -s 03:00.0 0x52f.B=10 fails...
I'm not sure this method actually works without the legacy BIOS. IIRC
that method was determined by reverse engineering the Windows drivers,
which means the legacy BIOS was in use.
JB.
--
Julien BLACHE <http://www.jblache.org>
<jb@jblache.org> GPG KeyID 0xF5D65169
next prev parent reply other threads:[~2010-02-12 11:24 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2010-02-11 20:38 Brightness control for MacBook Pro - Nvidia 9400 Soeren Sonnenburg
2010-02-11 20:44 ` Matthew Garrett
2010-02-11 23:13 ` Soeren Sonnenburg
2010-02-12 11:18 ` Julien BLACHE [this message]
2010-02-12 14:14 ` Matthew Garrett
2010-02-12 16:25 ` Julien BLACHE
2010-02-12 16:28 ` Matthew Garrett
2010-02-12 16:42 ` Soeren Sonnenburg
2010-02-12 16:44 ` Matthew Garrett
2010-02-12 16:55 ` Soeren Sonnenburg
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