linux_input_get_device_info: #keys = 0 linux_input_get_device_info: #ext_keys = 0 linux_input_get_device_info: button 0x100 present linux_input_get_device_info: button 0x101 present linux_input_get_device_info: #buttons = 2 linux_input_get_device_info: rel 0x00 present linux_input_get_device_info: rel 0x01 present linux_input_get_device_info: rel 0x02 present linux_input_get_device_info: rel 0x03 present linux_input_get_device_info: rel 0x04 present linux_input_get_device_info: rel 0x05 present linux_input_get_device_info: #rels = 6