linux-kernel - Re: [PATCH] toshiba_acpi: Add support for transflective LCD

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Message-ID: <20120313170710.GB17110@srcf.ucam.org>
Date:	Tue, 13 Mar 2012 17:07:10 +0000
From:	Matthew Garrett <mjg59@...f.ucam.org>
To:	Akio Idehara <zbe64533@...il.com>
Cc:	platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
	Charles@...wieters.org, corentin.chary@...il.com,
	seth.forshee@...onical.com
Subject: Re: [PATCH] toshiba_acpi: Add support for transflective LCD

On Wed, Mar 14, 2012 at 02:04:47AM +0900, Akio Idehara wrote:

> BTW, I have one question about disabling backlight interface.
> My toshiba laptop has three sysfs backlight interfaces,
> "acpi_video0", "intel_backlight" and "toshiba".
> Fedora16 is always using "acpi_video0" interface.
> If I add acpi_backlight=vendor in boot param,
> then Fedora16 uses "intel_backlight".
> # "toshiba" is lowest priority.
> So I want to know how to disable "intel_backlight" interface.
> Or enable "toshiba" interface only.

There's no general way to - the acpi interface, if present, should 
always be the preferred one. Hooking the transflective control into that 
is going to be more difficult.

-- 
Matthew Garrett | mjg59@...f.ucam.org
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