i have this too (green screen).
console output:

Nokia-770-36:~# canola
Traceback (most recent call last):
File "ecore.c_ecore_timer.pxi", line 12, in ecore.c_ecore.timer_cb
File "ecore.c_ecore_timer.pxi", line 74, in ecore.c_ecore.Timer._exec
File "canola-core/main/controller.py", line 235, in _lazy_init
File "canola-core/main/controller.py", line 112, in __init__
File "canola-core/main/controller.py", line 120, in _connect_to_canola_daemon
File "/usr/lib/python2.5/site-packages/dbus/_dbus.py", line 291, in connect_to_signal
File "/usr/lib/python2.5/site-packages/dbus/proxies.py", line 152, in connect_to_signal
File "/usr/lib/python2.5/site-packages/dbus/_dbus.py", line 179, in add_signal_receiver
File "/usr/lib/python2.5/site-packages/dbus/proxies.py", line 25, in __call__
File "/usr/lib/python2.5/site-packages/dbus/proxies.py", line 102, in __call__
File "dbus_bindings.pyx", line 466, in dbus_bindings.Connection.send_with_reply_and_block
DBusException: Could not get owner of name 'br.org.indt.canola.Daemon': no such name


I tried running canolad, didnt help.