linux-kernel - Re: [PATCH 2.6.18-mm2] acpi: add backlight support to the sony

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Date:	Tue, 10 Oct 2006 23:17:23 +0800
From:	Yu Luming <luming.yu@...il.com>
To:	Alessandro Guido <alessandro.guido@...il.com>
Cc:	Andrew Morton <akpm@...l.org>, linux-kernel@...r.kernel.org,
	linux-acpi@...r.kernel.org, len.brown@...el.com,
	jengelh@...ux01.gwdg.de, gelma@...ma.net, ismail@...dus.org.tr
Subject: Re: [PATCH 2.6.18-mm2] acpi: add backlight support to the sony_acpi driver

> I use this tool: http://www.xs4all.nl/~bsamwel/laptop_mode/tools/
> that automagically fires up whenever needed
>
> $ cat /etc/laptop-mode/batt-start/brightness
> #!/bin/sh
> echo -n CHOOSE_A_LOW_VALUE > /sys/class/backlight/sony/brightness

Also, we need to make hot-key events  have similar handling code .
For example, Fn+F5 and Fn+F6 are brightness down and up key on my sony laptop.  
There is a driver called sonypi.c can map Fn+F5/F6 to KEY_FN_F5/F6. But I 
think It should be mapped to KEY_BRIGHTNESSDOWN/UP (linux/input.h)
Although, sonypi.c is NOT so clean, but , if it can report right event to 
input layer for all sony laptop(it works for me), and all related functions 
can be controlled through generic sysfs interface, then I would say sony has 
the best hot-key solution I have even seen so far for linux.

Thanks,
Luming.

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