<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML><HEAD> <META http-equiv=Content-Type content="text/html; charset=gb2312"> <META content="MSHTML 6.00.2900.3314" name=GENERATOR> <STYLE>BLOCKQUOTE { MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px; MARGIN-LEFT: 2em } OL { MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px } UL { MARGIN-TOP: 0px; MARGIN-BOTTOM: 0px } </STYLE> </HEAD> <BODY> <DIV><FONT face=Verdana>I want to use dbus-send to send a method to umount the usb volume.</FONT></DIV> <DIV><FONT face=Verdana>However,the error is shown below:</FONT></DIV> <DIV><FONT face=Verdana size=2></FONT> </DIV> <DIV><FONT face=Verdana size=2>dbus-send --system --print-reply --dest=org.freedesktop.Hal /org/freedesktop/Hal/devices/volume_uuid_4409_6AFB org.freedesktop.Hal.Device.Volume.Unmount <BR>Error   org.freedesktop.DBus.Error.UnknownMethod: Method "UnMount" with signature "" on interface "org.freedesktop.Hal.Device.Volume" doesn't exist</FONT></DIV> <DIV><FONT face=Verdana size=2></FONT> </DIV> <DIV><FONT face=Verdana>I use "lshal" to see the hal info:</FONT></DIV> <DIV><FONT size=2>udi = '/org/freedesktop/Hal/devices/volume_uuid_4409_6AFB'<BR>  volume.unmount.valid_options = {'lazy'} (string list)<BR>  volume.mount.valid_options = {'ro', 'sync', 'dirsync', 'noatime', 'nodiratime', 'noexec', 'quiet', 'remount', 'exec', 'utf8', 'sho<BR>rtname=', 'codepage=', 'iocharset=', 'umask=', 'dmask=', 'fmask=', 'uid='} (string list)<BR>  org.freedesktop.Hal.Device.Volume.method_execpaths = {'hal-storage-mount', 'hal-storage-unmount', 'hal-storage-eject'} (string lis<BR>t)<BR>  org.freedesktop.Hal.Device.Volume.method_argnames = {'mount_point fstype extra_options', 'extra_options', 'extra_options'} (string<BR> list)<BR>  org.freedesktop.Hal.Device.Volume.method_signatures = {'ssas', 'as', 'as'} (string list)<BR>  org.freedesktop.Hal.Device.Volume.method_names = {'Mount', 'Unmount', 'Eject'} (string list)<BR>  info.interfaces = {'org.freedesktop.Hal.Device.Volume'} (string list)<BR>  volume.ignore = false  (bool)<BR>  info.udi = '/org/freedesktop/Hal/devices/volume_uuid_4409_6AFB'  (string)</FONT></DIV> <DIV>..........</DIV> <DIV> </DIV> <DIV> </DIV> <DIV>As you can see,the Unmount method is right there.</DIV> <DIV>How can I solve it?</DIV> <DIV>Thanks!</DIV> <DIV><FONT face=Verdana> </DIV> <DIV><FONT size=2></FONT> </DIV> <DIV align=left><FONT size=2> <HR style="WIDTH: 122px; HEIGHT: 2px" SIZE=2> </FONT></DIV> <DIV><FONT color=#c0c0c0><FONT size=2><SPAN>zhihuaye</SPAN></FONT></DIV> <DIV><FONT size=2>2008-06-05</FONT></FONT></DIV></FONT></BODY></HTML>