DBUS StartPeriodicDiscovery

Hi all,
I've made a software using DBUS StartPeriodicDiscovery monitoring in (almost) realtime bluetooth devices in range.
I've already used this software with many computer and bluetooth dongles without any problem (I've user it on a Asus eee with ubuntu and kernel 2.6.22, in a debian with kernel 2.6.23 and so on).

Now I've installed it on a ebox 2300SX
(http://www.compactpc.com.tw/ebox-2300SX.htm) using a customized debian 4.0 to run on compact flash with kernel 2.6.22.
I have two different problem :
- When I made a proxy call to StartPeriodicDiscovery sometime i receive
the response "Invalid argument", but if I made hciconfig hci0 reset before running the problem doesn't appear
- Events generated by StartPeriodicDiscovery (eg. RemoteDeviceFound) are
never called

I can see the led of the bluetooth dongle blinking whene proxy call to StartPeriodicDiscovery doesn't give error so I think periodic inquiry is running (I have not verified with hcidump because at the moment isnt' installed on the device and I can't install it )

The big difference from the 2300sx and the other installation is it doesn't have math coporcessor so I have compiled the kernel to support math emulation but I can't think this is the cause of my problems (why bluez should use math coprocessor?). Also in the dmesg of the device I found some error about ACPI ("ACPI: Unable to load the System Description Tables" and "pnp: PnP ACPI: disabled"), I'm not expert of ACPI but I think may cause some problems to usb devices...

Can someone give me a starting point to found the problem?

Many thanks
Fabrizio

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I try to give more info about the problem hoping someone can give me a little help.

I compiled the example from :
http://wiki.bluez.org/wiki/HOWTO/DiscoveringDevices (the "glib with C" one), used on laptop with ubuntu :all ok, on a pc with debian :all ok, on ebox 2300sx with debian 4.0 NOTHING (no errors no responses).

- dbus is running
- hcid is running
- if I make "hcitool scan" I can see the nearest bluetooth devices
- In syslog the only messages are "hcid[1794]: name_listener_add(:1.1)" and "hcid[1794]: DiscoverDevices requestor at :1.1 exited before the operation finished" (I've stopped the program after about 6/7 minutes of no-output)

I think problem is dbus related but I don't know where to look, I also tried "dbus-send --system --type=method_call --print-reply --dest=org.bluez /org/bluez/hci0 org.bluez.Adapter.GetMode" to interact with dbus and all works fine so the problem may be in Discovery related methods.

Suggestion?
Many thanks

Il giorno 01/apr/08, alle ore 18:59, Fabrizio Guglielmino ha scritto:

Hi all,
I've made a software using DBUS StartPeriodicDiscovery monitoring in (almost) realtime bluetooth devices in range.
I've already used this software with many computer and bluetooth dongles without any problem (I've user it on a Asus eee with ubuntu and kernel 2.6.22, in a debian with kernel 2.6.23 and so on).

Now I've installed it on a ebox 2300SX
(http://www.compactpc.com.tw/ebox-2300SX.htm) using a customized debian 4.0 to run on compact flash with kernel 2.6.22.
I have two different problem :
- When I made a proxy call to StartPeriodicDiscovery sometime i receive the response "Invalid argument", but if I made hciconfig hci0 reset before running the problem doesn't appear
- Events generated by StartPeriodicDiscovery (eg. RemoteDeviceFound) are never called

I can see the led of the bluetooth dongle blinking whene proxy call to StartPeriodicDiscovery doesn't give error so I think periodic inquiry is running (I have not verified with hcidump because at the moment isnt' installed on the device and I can't install it )

The big difference from the 2300sx and the other installation is it doesn't have math coporcessor so I have compiled the kernel to support math emulation but I can't think this is the cause of my problems (why bluez should use math coprocessor?). Also in the dmesg of the device I found some error about ACPI ("ACPI: Unable to load the System Description Tables" and "pnp: PnP ACPI: disabled"), I'm not expert of ACPI but I think may cause some problems to usb devices...

Can someone give me a starting point to found the problem?

Many thanks
Fabrizio

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Hi Fabrizio,

Discover process is automatically canceled when the client exits. dbus-send will not work, try d-feet or other client that keeps the D-Bus connection opened.

Regards,
Claudio.