Hi,

I have the following problem:
4252@17:04 errge@lisa:~$ qdbus --system org.bluez
/
Cannot introspect object / at org.bluez:
org.freedesktop.DBus.Error.UnknownInterface (Interface 'org.freedesktop.DBus.Introspectable' was not found)

This is caused by the fact that:
  - QtDBus is buggy as hell, :)
  - BlueZ doesn't include introspection API in the introspection output.

Either of the causes got solved, the whole issue is solved.  After
checking the code of QtDBus I decided to go with the second.  See the
attached patch.  After applying it everything works fine:
4252@17:04 errge@lisa:~$ qdbus --system org.bluez
/
/org
/org/bluez
/org/bluez/9746
/org/bluez/9746/any
/org/bluez/9746/hci0
/org/bluez/test

If you need clarification or have comments about any of these, please
don't hesitate to reply!

Thanks in advance,
Gergely