timonin@spb9:~$ system-config-printer --debug
+<NewPrinterGUI object at 0x18eb2d0 (newprinter+NewPrinterGUI at 0x19b82a0)>
Connected as user timonin
+<PrinterPropertiesDialog object at 0x18f6550 (printerproperties+PrinterPropertiesDialog at 0x7f4d9406e500)>
<authconn.Connection instance at 0x18e5bd8>: Operation += 'obtaining queue details'
Authentication pass: 1
Authentication: password callback set
Authentication pass: 1
Authentication: password callback set
Authentication pass: 1
Authentication: password callback set
<authconn.Connection instance at 0x18e5bd8>: Operation ended
+<ppdcache.PPDCache instance at 0x18fca70>
refresh
Created subscription 30, events=['printer-added', 'printer-deleted', 'printer-state-changed']
Next notifications fetch in 1s
Deferred populateList by 200ms
update_jobs
<authconn.Connection instance at 0x18e5bd8>: Operation += 'obtaining queue details'
Authentication pass: 1
Authentication: password callback set
Authentication pass: 1
Authentication: password callback set
Authentication pass: 1
Authentication: password callback set
<authconn.Connection instance at 0x18e5bd8>: Operation ended
get_notifications
update_jobs
Next notifications fetch in 60s
Connected as user timonin
Authentication pass: 1
Authentication: password callback set
Authentication pass: 1
Authentication: password callback set
Examining firewall
D-Bus exception examining firewall
Using polkit-1 connection class
+<asyncipp._IPPAuthOperation instance at 0x1ba86c8>
New IPPConnection
+<_IPPConnectionThread(Thread-1, initial daemon)>
+<asyncipp.IPPAuthConnection instance at 0x1ba84d0>
Awaiting further instructions
Exception assessing DevicesGet API: org.freedesktop.DBus.Error.ServiceUnknown: The name org.opensuse.CupsPkHelper.Mechanism was not provided by any .service files
+<asyncpk1.PK1Connection instance at 0x1ba83f8>
+<asyncconn.Connection object at 0x1ba7790>
fetchDevices
+<asyncconn._AsyncMethodCall instance at 0x1bb85f0>
Converted ()/{'exclude_schemes': ['dnssd', 'snmp', 'bluetooth'], 'reply_handler': <bound method _AsyncMethodCall.reply_handler of <asyncconn._AsyncMethodCall instance at 0x1bb85f0>>, 'error_handler': <bound method _AsyncMethodCall.error_handler of <asyncconn._AsyncMethodCall instance at 0x1bb85f0>>, 'auth_handler': <bound method _AsyncMethodCall.auth_handler of <asyncconn._AsyncMethodCall instance at 0x1bb85f0>>} to (0, [], ['dnssd', 'snmp', 'bluetooth'])
+_PK1AsyncMethodCall: <asyncpk1._PK1AsyncMethodCall instance at 0x1bb8710>
Calling PK method DevicesGet
D-Bus call failed: DBusException('The name org.opensuse.CupsPkHelper.Mechanism was not provided by any .service files',)
+<asyncipp._IPPAuthOperation instance at 0x1bb8a28>
Next task: (<method 'getDevices' of 'cups.Connection' objects>, (), {'exclude_schemes': ['dnssd', 'snmp', 'bluetooth']}, <bound method _PK1AsyncMethodCall._ipp_reply_handler of <asyncpk1._PK1AsyncMethodCall instance at 0x1bb8710>>, <bound method _IPPAuthOperation.error_handler of <asyncipp._IPPAuthOperation instance at 0x1bb8a28>>, <bound method _IPPAuthOperation.auth_handler of <asyncipp._IPPAuthOperation instance at 0x1bb8a28>>)
-<asyncipp._IPPAuthOperation instance at 0x1ba86c8>
Call <method 'getDevices' of 'cups.Connection' objects>
...success
Awaiting further instructions
DESTROY: <asyncconn._AsyncMethodCall instance at 0x1bb85f0>
fetchDevices
+<asyncconn._AsyncMethodCall instance at 0x1bb8950>
Converted ()/{'reply_handler': <bound method _AsyncMethodCall.reply_handler of <asyncconn._AsyncMethodCall instance at 0x1bb8950>>, 'include_schemes': ['dnssd', 'snmp', 'bluetooth'], 'auth_handler': <bound method _AsyncMethodCall.auth_handler of <asyncconn._AsyncMethodCall instance at 0x1bb8950>>, 'error_handler': <bound method _AsyncMethodCall.error_handler of <asyncconn._AsyncMethodCall instance at 0x1bb8950>>} to (0, ['dnssd', 'snmp', 'bluetooth'], [])
+_PK1AsyncMethodCall: <asyncpk1._PK1AsyncMethodCall instance at 0x1bb8ab8>
Calling PK method DevicesGet
D-Bus call failed: DBusException('The name org.opensuse.CupsPkHelper.Mechanism was not provided by any .service files',)
+<asyncipp._IPPAuthOperation instance at 0x1bb8cf8>
Next task: (<method 'getDevices' of 'cups.Connection' objects>, (), {'include_schemes': ['dnssd', 'snmp', 'bluetooth']}, <bound method _PK1AsyncMethodCall._ipp_reply_handler of <asyncpk1._PK1AsyncMethodCall instance at 0x1bb8ab8>>, <bound method _IPPAuthOperation.error_handler of <asyncipp._IPPAuthOperation instance at 0x1bb8cf8>>, <bound method _IPPAuthOperation.auth_handler of <asyncipp._IPPAuthOperation instance at 0x1bb8cf8>>)
-<asyncipp._IPPAuthOperation instance at 0x1bb8a28>
Call <method 'getDevices' of 'cups.Connection' objects>
Traceback (most recent call last):
  File "/usr/share/system-config-printer/asyncipp.py", line 197, in send_reply
    handler (self._conn, result)
  File "/usr/share/system-config-printer/asyncpk1.py", line 140, in _ipp_reply_handler
    self._client_reply_handler (self._conn, *args)
  File "/usr/share/system-config-printer/asyncconn.py", line 93, in reply_handler
    self._reply_handler (self, self._reply_data, *args)
  File "/usr/share/system-config-printer/asyncconn.py", line 204, in _subst_reply_handler
    reply_handler (self, *args)
  File "/usr/lib/pymodules/python2.7/cupshelpers/cupshelpers.py", line 602, in _reply_handler
    self._client_reply_handler (connection, devices)
  File "/usr/share/system-config-printer/newprinter.py", line 1375, in <lambda>
    current_uri))
  File "/usr/share/system-config-printer/newprinter.py", line 1405, in local_devices_reply
    self.add_devices (result, current_uri)
  File "/usr/share/system-config-printer/newprinter.py", line 1804, in add_devices
    physdev = model.get_value (iter, 1)
TypeError: iter must be a GtkTreeIter
...success
Awaiting further instructions