[Synce-devel] DBUS fails in Ubuntu

[Michal Vrchota]

Hi, I hope this is the right topic :)

I am running Ubuntu 7.10 with HTC TyTN WM6 - I have done everything
according to the manual

Run odccm as root, connecting device is fine. But I can not run any
python tools (for partnership management) from sync-engine, because DBUS
will always fail.

Device is connected!

***@techi-notebook:~/$ pls
Directory 2007-10-06 18:32:34 Personal/
Directory 2007-06-01 01:00:18 Templates/
Directory 2007-10-06 18:32:34 My Videos/
Directory 2007-10-06 18:32:36 My Ringtones/
Directory 2007-10-06 18:32:40 My Music/
Directory 2007-10-06 18:32:40 My Midlets/

DBUS & ODCCM is running!

***@techi-notebook:~/synce-gnome-0.10.0/src$ ps aux | grep *dbus*
techi 7408 0.0 0.1 2984 756 pts/0 R+ 10:34 0:00 grep
*dbus*
***@techi-notebook:~/synce-gnome-0.10.0/src$ ps aux | grep dbus
103 4700 0.0 0.2 3036 1200 ? Ss 07:15
0:01 /usr/bin/dbus-daemon --system
root 4743 0.0 0.2 2772 1256 ? S 07:15 0:00
dbus-daemon --session --print-address --nofork
techi 5649 0.0 0.1 4436 544 ? Ss 07:15
0:00 /usr/bin/ssh-agent /usr/bin/dbus-launch --exit-with-session
x-session-manager
techi 5652 0.0 0.1 2700 644 ? S 07:15
0:00 /usr/bin/dbus-launch --exit-with-session x-session-manager
techi 5653 0.0 0.2 2908 1072 ? Ss 07:15
0:00 /usr/bin/dbus-daemon --fork --print-pid 4 --print-address 8
--session
dhcp 7341 0.0 0.2 2416 1164 ? S 10:33
0:00 /sbin/dhclient -1 -lf /var/lib/dhcp3/dhclient.eth1.leases
-pf /var/run/dhclient.eth1.pid -q -e dhc_dbus=31 -d eth1
techi 7410 0.0 0.1 2988 780 pts/0 S+ 10:34 0:00 grep
dbus
***@techi-notebook:~/synce-gnome-0.10.0/src$ ps aux | grep dbus
103 4700 0.0 0.2 3036 1200 ? Ss 07:15
0:01 /usr/bin/dbus-daemon --system
root 4743 0.0 0.2 2772 1256 ? S 07:15 0:00
dbus-daemon --session --print-address --nofork
techi 5649 0.0 0.1 4436 544 ? Ss 07:15
0:00 /usr/bin/ssh-agent /usr/bin/dbus-launch --exit-with-session
x-session-manager
techi 5652 0.0 0.1 2700 644 ? S 07:15
0:00 /usr/bin/dbus-launch --exit-with-session x-session-manager
techi 5653 0.0 0.2 2908 1072 ? Ss 07:15
0:00 /usr/bin/dbus-daemon --fork --print-pid 4 --print-address 8
--session
dhcp 7341 0.0 0.2 2416 1164 ? S 10:33
0:00 /sbin/dhclient -1 -lf /var/lib/dhcp3/dhclient.eth1.leases
-pf /var/run/dhclient.eth1.pid -q -e dhc_dbus=31 -d eth1
techi 7431 0.0 0.1 2980 756 pts/0 R+ 10:35 0:00 grep
dbus
***@techi-notebook:~/synce-gnome-0.10.0/src$ ps aux | grep odccm
root 7221 0.0 0.3 3728 1596 ? Ss 10:32 0:00 odccm
techi 7519 0.0 0.1 2984 760 pts/0 R+ 10:36 0:00 grep
odccm
***@techi-notebook:~/synce-gnome-0.10.0/src$

but it can not access DBUS from python, altough all required packages
are installed (python2.5, python-dbus, notification-python, libdbus
etc.)

***@techi-notebook:~/synce-gnome-0.10.0/src$ sudo python test.py
Traceback (most recent call last):
File "test.py", line 120, in <module>
TestApp()
File "test.py", line 20, in __init__
session_bus = dbus.SessionBus()
File "/var/lib/python-support/python2.5/dbus/_dbus.py", line 218, in
__new__
mainloop=mainloop)
File "/var/lib/python-support/python2.5/dbus/_dbus.py", line 107, in
__new__
bus = BusConnection.__new__(subclass, bus_type, mainloop=mainloop)
File "/var/lib/python-support/python2.5/dbus/bus.py", line 121, in
__new__
bus = cls._new_for_bus(address_or_type, mainloop=mainloop)
dbus.exceptions.DBusException: org.freedesktop.DBus.Error.NoReply: Did
not receive a reply. Possible causes include: the remote application did
not send a reply, the message bus security policy blocked the reply, the
reply timeout expired, or the network connection was broken.

I have no idea what can be possibly wrong.
This piece of code - dbus.SessionBus() - just does not work
I have read that DBUS API is unstable, but I think with most updated
packages from recent ubuntu, everything should be just fine.

Thanks for any help

[John Carr]

Hi!

Post by Michal Vrchota
File "test.py", line 120, in <module>
TestApp()
File "test.py", line 20, in __init__
session_bus = dbus.SessionBus()
File "/var/lib/python-support/python2.5/dbus/_dbus.py", line 218, in
__new__
mainloop=mainloop)
File "/var/lib/python-support/python2.5/dbus/_dbus.py", line 107, in
__new__
bus = BusConnection.__new__(subclass, bus_type, mainloop=mainloop)
File "/var/lib/python-support/python2.5/dbus/bus.py", line 121, in
__new__
bus = cls._new_for_bus(address_or_type, mainloop=mainloop)
dbus.exceptions.DBusException: org.freedesktop.DBus.Error.NoReply: Did
not receive a reply. Possible causes include: the remote application did
not send a reply, the message bus security policy blocked the reply, the
reply timeout expired, or the network connection was broken.

IIRC, You shouldn't be running this (or sync-engine) as root. Drop the
sudo and see if you get a different error.

John

[John Carr]

Hello, when i run this not as a root, the error is pretty much same.
list_partnerships.py
File "list_partnerships.py", line 9, in <module>
engine =
dbus.Interface(dbus.SessionBus().get_object(DBUS_SYNCENGINE_BUSNAME,
DBUS_SYNCENGINE_OBJPATH), DBUS_SYNCENGINE_BUSNAME)
File "/var/lib/python-support/python2.5/dbus/bus.py", line 240, in
get_object
follow_name_owner_changes=follow_name_owner_changes)
File "/var/lib/python-support/python2.5/dbus/proxies.py", line 236, in
__init__
self._named_service = conn.activate_name_owner(bus_name)
File "/var/lib/python-support/python2.5/dbus/bus.py", line 179, in
activate_name_owner
self.start_service_by_name(bus_name)
File "/var/lib/python-support/python2.5/dbus/bus.py", line 277, in
start_service_by_name
'su', (bus_name, flags)))
File "/var/lib/python-support/python2.5/dbus/connection.py", line 603,
in call_blocking
message, timeout)
org.freedesktop.DBus.Error.ServiceUnknown: The name org.synce.SyncEngine
was not provided by any .service files
So what do You think could be possible wrong?

Heh, only seem the same to an untrained eye :-)

For the list_partnerships.py script to work sync-engine needs to be
running (and not as root), otherwise the script won't be able to find
it on dbus and will crash like this.

John