Comment 8 for bug 1008898

TEST CASE
1. Start an installation with Ubiquity on Hardware, without wired connection and with a Wifi Card
2. Proceed to Wireless setup page
3. Select a network
4. Enter password
5. Click on 'Connect'

ACTUAL RESULT:
Crash below

WORKAROUND:
Setup the Wifi connection from network-manager before starting Ubiquity

Jun 5 07:59:45 ubuntu ubiquity[3109]: Step_before = stepPrepare
Jun 5 07:59:45 ubuntu ubiquity[3109]: switched to page wireless
Jun 5 08:00:19 ubuntu ubiquity[3109]: Exception in GTK frontend (invoking crash handler):
Jun 5 08:00:19 ubuntu ubiquity[3109]: Traceback (most recent call last):
Jun 5 08:00:19 ubuntu ubiquity[3109]: File "/usr/lib/ubiquity/ubiquity/frontend/gtk_ui.py", line 1328, in on_next_clicked
Jun 5 08:00:19 ubuntu ubiquity[3109]: if ui.plugin_on_next_clicked():
Jun 5 08:00:19 ubuntu ubiquity[3109]: File "/usr/lib/ubiquity/plugins/ubi-wireless.py", line 134, in plugin_on_next_clicked
Jun 5 08:00:19 ubuntu ubiquity[3109]: self.nmwidget.connect_to_ap()
Jun 5 08:00:19 ubuntu ubiquity[3109]: File "/usr/lib/ubiquity/ubiquity/nm.py", line 443, in connect_to_ap
Jun 5 08:00:19 ubuntu ubiquity[3109]: self.view.connect_to_selection(passphrase)
Jun 5 08:00:19 ubuntu ubiquity[3109]: File "/usr/lib/ubiquity/ubiquity/nm.py", line 384, in connect_to_selection
Jun 5 08:00:19 ubuntu ubiquity[3109]: self.wifi_model.connect_to_ap(model[parent][0], ssid, passphrase)
Jun 5 08:00:19 ubuntu ubiquity[3109]: File "/usr/lib/ubiquity/ubiquity/nm.py", line 126, in connect_to_ap
Jun 5 08:00:19 ubuntu ubiquity[3109]: obj, dbus.ObjectPath(device), dbus.ObjectPath(saved_path))[1]
Jun 5 08:00:19 ubuntu ubiquity[3109]: File "/usr/lib/python3/dist-packages/dbus/proxies.py", line 145, in __call__
Jun 5 08:00:19 ubuntu ubiquity[3109]: **keywords)
Jun 5 08:00:19 ubuntu ubiquity[3109]: File "/usr/lib/python3/dist-packages/dbus/connection.py", line 651, in call_blocking
Jun 5 08:00:19 ubuntu ubiquity[3109]: message, timeout)
Jun 5 08:00:19 ubuntu ubiquity[3109]: dbus.exceptions.DBusException: org.freedesktop.DBus.Error.UnknownMethod: Method "AddAndActivateConnection" with signature "a{sa{sv}}ss" on interface "(null)" doesn't exist
Jun 5 08:00:19 ubuntu ubiquity[3109]:
Jun 5 08:00:19 ubuntu ubiquity[3109]:
Jun 5 08:00:20 ubuntu ubiquity[3109]: log-output -t ubiquity /usr/share/apport/apport-gtk