linux-kernel - Re: [PATCH v4 0/2] Add driver for Apple gmux device

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:	Wed, 21 Mar 2012 08:36:47 -0400
From:	Shea Levy <shea@...alevy.com>
To:	Seth Forshee <seth.forshee@...onical.com>
CC:	Matthew Garrett <mjg@...hat.com>,
	platform-driver-x86@...r.kernel.org,
	Richard Purdie <rpurdie@...ys.net>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4 0/2] Add driver for Apple gmux device

Hi Seth,

On 03/16/2012 03:41 PM, Seth Forshee wrote:
> Apple laptops with hybrid graphics have a device named gmux that is used
> for switching between GPUs and backlight control. On many models this is
> the only reliable method for controlling the backlight.
>
> This series adds initial support for the gmux device, along with
> anciallary support for disabling apple_bl when the gmux device is
> detected. Initially only backlight control is supported.
>
>

I've done some basic testing on my MBP 5,3 (just setting a few 
brightness levels, nothing fancy), and it all works, so feel free to add 
my basic

Tested-by: Shea Levy <shea@...alevy.com>

if you wish. Please let me know if you need testing for future gmux 
features.

A few questions:
     * I'm using nouveau, and with the gmux I have both gmux_backlight 
and nv_backlight (which never worked) in /sys/class/backlight, is this 
expected?
     * Is there anything I can do to test the backlight interface in 
addition to setting brightness levels?
     * Besides the sysfs backlight interface, are there any other 
userspace-visible changes your driver makes that I should test?

Cheers,
Shea Levy
--
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/