------- Comment #19 from rui.zhang@... 2008-07-06 23:59 -------
It seems that the standard _BCM method, which pokes the graphics device pci
config space LBB register, doesn't work on your laptops. I don't know if this
is normal, but I'll ask some graphics guys later. :)
then we have some other ways to make the backlight work for you,
1. check if there are any platform specific methods to control the brightness
which is not supported by sony-laptop driver currently. cc Mattia Dongili, the
maintainer of sony-laptop driver and see if he has some ideas. :)
2. in X mode, you can use xrandr/xbacklight to change the brightness, which
pokes the native graphics device register.
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