linux-kernel - Re: Brightness control for MacBook Pro

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [thread-next>] [day] [month] [year] [list]

Date:	Fri, 12 Feb 2010 17:25:22 +0100
From:	Julien BLACHE <jb@...ache.org>
To:	Matthew Garrett <mjg59@...f.ucam.org>
Cc:	Soeren Sonnenburg <sonne@...ian.org>, nicolas@...chat.ch,
	felipe_alfaro@...uxmail.org,
	Linux Kernel <linux-kernel@...r.kernel.org>
Subject: Re: Brightness control for MacBook Pro - Nvidia 9400

Matthew Garrett <mjg59@...f.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@...ache.org>                                  GPG KeyID 0xF5D65169
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/