dbus-send use?

[ttlee1984]

Hi all,

I have a question in the use of dbus-send. It requires the --dest argument.
But what is it? In the man page it says it is the name of the connection, I
assume it refers to what is called "well-known bus name" in the
specification. But how should I use it or even know this name? For example,
I want to check the brightness of the computer. I now know the object path
,which is /org/freedesktop/Hal/device/computer_backlight   The interface is
org.freedesktop.Hal.Device.LaptopPanel  and the method is
GetBrightness(void). So how shoud I use dbus-send to call this method? I
have tried several combinations but did not get any luck. Any help will be
appreciated.

Cheers
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