<html><head><style type="text/css"></style></head><body><div style="font-family:arial,helvetica,sans-serif;font-size:10pt">Try this one:<br><br>dbus-send --session --type=method_call --print-reply --dest=org.freedesktop.Hal.Device.LaptopPanel /org/freedesktop/Hal/device/computer_backlight org.freedesktop.Hal.Device.LaptopPanel.GetBrightness<br><br>Regards,<br>Sedat<br><div style="font-family: arial,helvetica,sans-serif; font-size: 10pt;"><br><div style="font-family: times new roman,new york,times,serif; font-size: 12pt;"><font face="Tahoma" size="2"><hr size="1"><b><span style="font-weight: bold;">From:</span></b> ttlee1984 <ttlee1984@gmail.com><br><b><span style="font-weight: bold;">To:</span></b> danny <tornadory@163.com><br><b><span style="font-weight: bold;">Cc:</span></b> dbus@lists.freedesktop.org<br><b><span style="font-weight: bold;">Sent:</span></b> Thu, June 10, 2010 10:11:32 AM<br><b><span style="font-weight: bold;">Subject:</span></b> Re: dbus-send use?<br></font><br> Thanks for the advice. I will check it. But may I say it is a little bit different from what I wanted to know? My original question is, if I already know the object path (for example /org/freedesktop/Hal/device/computer_backlight), the interface (org.freedesktop.Hal.Device.LaptopPanel),  and the method (GetBrightness(void)), how should I inquiry this mehtod by dbus-send? Or isn't it enough to know just this three pieces of information call it? <br> <br>Because I am also using Qt binding, and for example there is a API<br><h3 style="font-weight: normal;" class="fn"><font size="2">QDBusMessage QDBusMessage::createMethodCall ( const <a rel="nofollow" target="_blank" href="http://doc.qt.nokia.com/4.6/qstring.html">QString</a> & <i>service</i>, const <a rel="nofollow" target="_blank" href="http://doc.qt.nokia.com/4.6/qstring.html">QString</a> & <i>path</i>, const <a rel="nofollow" target="_blank" href="http://doc.qt.nokia.com/4.6/qstring.html">QString</a> & <i>interface</i>, const <a rel="nofollow" target="_blank" href="http://doc.qt.nokia.com/4.6/qstring.html">QString</a> & <i>method</i> )</font></h3> But I can't figure out what is this argument "service". There is no corresponding concept in the DBus specification. Or as I asked, does it mean the well-known connection name? <br><br>Thanks for the help!<br> <br><div class="gmail_quote">2010/6/10 danny <span dir="ltr"><<a rel="nofollow" ymailto="mailto:tornadory@163.com" target="_blank" href="mailto:tornadory@163.com">tornadory@163.com</a>></span><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> Perhaps you could try the "d-feet" tool. It could list all of the running dbus services.<br><br>For others, you should check the documents for specific program.<br><br><div>--<br> <div> Best Regards,<br> <br></div> </div><br>在2010-06-10 05:18:13，ttlee1984 <<a rel="nofollow" ymailto="mailto:ttlee1984@gmail.com" target="_blank" href="mailto:ttlee1984@gmail.com">ttlee1984@gmail.com</a>> 写道：<div><br> <blockquote style="border-left: 1px solid rgb(204, 204, 204); margin: 0px 0px 0px 0.8ex; padding-left: 1ex;"> Hi all,<br><br>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.<br> <br>Cheers<br> </blockquote><br><br><span title="neteasefooter"></span></div><hr> <a rel="nofollow" target="_blank" href="http://ym.163.com/?from=od3">网易为中小企业免费提供企业邮箱（自主域名）</a> </blockquote></div><br> </div></div> </div><br> </body></html>