Thanks Loïc for your detailed explanation. I have removed /etc/hal/fdi/policy/10-wacom.fdi and edited my /etc/X11/xorg.conf as you suggested, and it worked: now ‘cursor’, ‘eraser’, and ‘stylus’ are all working. For your reference, I attach my /etc/X11/xorg.conf.
Thanks Loïc for your detailed explanation. I have removed /etc/hal/ fdi/policy/ 10-wacom. fdi and edited my /etc/X11/xorg.conf as you suggested, and it worked: now ‘cursor’, ‘eraser’, and ‘stylus’ are all working. For your reference, I attach my /etc/X11/xorg.conf.