If I understand this correctly, I just type "GEIS_DEBUG=3 geistest" in terminal? Used google to find the answer. It shows:

per-olav@asus12:~$ GEIS_DEBUG=3 geistest
GEIS(debug)-geis_register_backend:95 back end 0 registered as 'com.canonical.oif.backend.mock'
GEIS(debug)-geis_register_backend:95 back end 1 registered as 'com.canonical.oif.backend.dbus'
GEIS(debug)-geis_register_backend:95 back end 2 registered as 'com.canonical.oif.backend.grail'
GEIS(warning)-_set_valist:654 back end not specified, defaulting to DBus
GEIS(debug)-geis_backend_by_name:125 creating back end of class "com.canonical.oif.backend.dbus"
GEIS(debug)-_geis_wait_for_init:684 waiting for initialization to complete...
GEIS(debug)-geis_backend_multiplexor_pump:415 activity 0x1 on fd 7 callback_info=0x1ac8560
GEIS(warning)-_locator_message_handler:120 server not found!
GEIS(debug)-geis_backend_multiplexor_pump:415 activity 0x1 on fd 5 callback_info=0x1ac79f0
GEIS(debug)-_input_event_handler:261 input event available
GEIS(debug)-geis_backend_delete:162 destroying back end com.canonical.oif.backend.dbus
GEIS(debug)-geis_backend_by_name:125 creating back end of class "com.canonical.oif.backend.grail"
GEIS(debug)-geis_register_gesture_class:1219 registering class "Drag" id 0
GEIS(debug)-geis_register_gesture_class:1219 registering class "Pinch" id 1
GEIS(debug)-geis_register_gesture_class:1219 registering class "Rotate" id 2
GEIS(debug)-geis_register_gesture_class:1219 registering class "Tap" id 15
GEIS(debug)-geis_register_gesture_class:1219 registering class "Touch" id 32
GEIS(debug)-geis_register_region:1467 registering region
GEIS(debug)-geis_backend_multiplexor_pump:415 activity 0x1 on fd 5 callback_info=0x1ac79f0
GEIS(debug)-_input_event_handler:261 input event available
GEIS(debug)-_default_output_event_callback:132 posting output event
GEIS(debug)-geis_backend_multiplexor_pump:415 activity 0x1 on fd 9 callback_info=0x1ad9b70
GEIS(debug)-geis_register_device:1258 registering device "ETPS/2 Elantech Touchpad" id 40496
GEIS(debug)-geis_backend_multiplexor_pump:415 activity 0x1 on fd 5 callback_info=0x1ac79f0
GEIS(debug)-_input_event_handler:261 input event available
GEIS(debug)-_default_output_event_callback:132 posting output event
GEIS(debug)-geis_backend_multiplexor_pump:415 activity 0x1 on fd 5 callback_info=0x1ac79f0
GEIS(debug)-_input_event_handler:261 input event available
GEIS(debug)-_default_output_event_callback:132 posting output event
GEIS(debug)-geis_backend_multiplexor_pump:415 activity 0x1 on fd 5 callback_info=0x1ac79f0
GEIS(debug)-_input_event_handler:261 input event available
GEIS(debug)-_default_output_event_callback:132 posting output event
GEIS(debug)-geis_backend_multiplexor_pump:415 activity 0x1 on fd 5 callback_info=0x1ac79f0
GEIS(debug)-_input_event_handler:261 input event available
GEIS(debug)-_default_output_event_callback:132 posting output event
GEIS(debug)-geis_backend_multiplexor_pump:415 activity 0x1 on fd 5 callback_info=0x1ac79f0
GEIS(debug)-_input_event_handler:261 input event available
GEIS(debug)-_default_output_event_callback:132 posting output event
GEIS(debug)-geis_backend_multiplexor_pump:415 activity 0x1 on fd 5 callback_info=0x1ac79f0
GEIS(debug)-_input_event_handler:261 input event available
GEIS(debug)-_default_output_event_callback:132 posting output event
GEIS(debug)-_geis_wait_for_init:722 ... initialization complete, status=0
GEIS(debug)-geis_register_gesture_class:1219 registering class "Flick" id 128
GEIS(debug)-geis_subscription_new:409 created subscription "0x000000c5" id 0
Device 40496 added
	attr "device name" = "ETPS/2 Elantech Touchpad"
	attr "device id" = 40496
	attr "device touches" = 5
	attr "direct touch" = false
	attr "independent touch" = false
	attr "device X minimum" = 0.000000
	attr "device X maximum" = 3260.000000
	attr "device X resolution" = 32000.000000
	attr "device Y minimum" = 0.000000
	attr "device Y maximum" = 2119.000000
	attr "device Y resolution" = 32000.000000
GEIS(debug)-geis_backend_multiplexor_pump:415 activity 0x1 on fd 5 callback_info=0x1ac79f0
GEIS(debug)-_input_event_handler:261 input event available
GEIS(debug)-_default_output_event_callback:132 posting output event
GEIS(debug)-_v1_subscribe_device:638 	"Drag,touch=2"
GEIS(debug)-_v1_subscribe_device:638 	"Drag,touch=3"
GEIS(debug)-_v1_subscribe_device:638 	"Pinch,touch=2"
GEIS(debug)-_v1_subscribe_device:638 	"Pinch,touch=3"
GEIS(debug)-_v1_subscribe_device:638 	"Rotate,touch=2"
GEIS(debug)-_v1_subscribe_device:638 	"Rotate,touch=3"
GEIS(debug)-_v1_subscribe_device:638 	"Tap,touch=2"
GEIS(debug)-_v1_subscribe_device:638 	"Tap,touch=3"
GEIS(debug)-_v1_subscribe_device:638 	"Tap,touch=4"
GEIS(debug)-_v1_subscribe_device:638 	"Touch,touch=3"
GEIS(debug)-_v1_subscribe_device:638 	"Touch,touch=4"
GEIS(debug)-_v1_subscribe_device:638 	"Flick,touch=2"
GEIS(debug)-_v1_subscribe_device:638 	"Flick,touch=3"
GEIS(debug)-_v1_subscribe_device:638 	"Flick,touch=4"
GEIS(debug)-geis_backend_token_activate:64 called
GEIS(debug)-_geis_grail_activate_with_filters:2214 filter 0x1ad8200 'Drag,touch=2' matches ALL devices
GEIS(debug)-_geis_grail_filter_gestures:1986 mask=0x00000001 start=2 min=1 max=2
GEIS(debug)-_geis_grail_activate_for_device_region:2086 subscription='0x000000c5' filter='Drag,touch=2' device=40496 'ETPS/2 Elantech Touchpad' window=0x000000c5 ugsub=0x1adc1e0 atomic=1
GEIS(error)-geis_grail_window_grab_store_grab:153 error 1 returned from XIGrabTouchBegin()
GEIS(error)-_geis_grail_activate_for_device_region:2099 failed to grab input on window 0x000000c5
error subscribing to gestures
error subscribing window 0x000000c5
per-olav@asus12:~$