Brightness control on Lenovo S10-2

[Tịnh Nguyễn Thanh]

Hi all!
I'm using Lenovo S10-2
When I use HAL & DBUS to set a new LCD brightness level, now the brightness
level has been changed successfully.
But I see that the actual brightness of LCD isn't changed.
When I run the following command as root to change brightness level of LCD:
$ echo 3 > /sys/class/backlight/acpi_video0/brightness
now the brightness level has been changed to 3.
But the brightness of LCD isn't changed too.
I got the same result when I control brightness via procfs
(/proc/acpi/video/...).

Does HAL not support to control LCD device of Lenovo S10-2?
please help me!
Thank you so much...

-- 
Tinh, Nguyen Thanh
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