From: Julien BLACHE <jb@jblache.org>
To: Matthew Garrett <mjg59@srcf.ucam.org>
Cc: Soeren Sonnenburg <sonne@debian.org>,
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 17:25:22 +0100 [thread overview]
Message-ID: <87zl3eto99.fsf@sonic.technologeek.org> (raw)
In-Reply-To: <20100212141457.GA18714@srcf.ucam.org> (Matthew Garrett's message of "Fri, 12 Feb 2010 14:14:57 +0000")
Matthew Garrett <mjg59@srcf.ucam.org> wrote:
Hi,
>> If you know how one can determine which GPU is active, let me know. I
>> don't have this information at the moment.
>
> There's a _DSM method in the ACPI tables that you need to execute.
Is it exposed to userspace in any way? Or, better yet, could we have an
MBP backlight driver which would hide all of this from userspace?
JB.
--
Julien BLACHE <http://www.jblache.org>
<jb@jblache.org> GPG KeyID 0xF5D65169
next prev parent reply other threads:[~2010-02-12 16:25 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
2010-02-12 14:14 ` Matthew Garrett
2010-02-12 16:25 ` Julien BLACHE [this message]
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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