You can check the XInput pointer status by using xsetpointer as below. The man page states that calling xsetpointer with the name of a particular device will set it as the primary pointing device.
[root@ayukawa log]# xsetpointer -l "eraser" [XExtensionDevice] "stylus" [XExtensionDevice] "cursor" [XExtensionDevice] "Mouse0" [XPointer] "keyboard" [XKeyboard]
