Thank you very much for the quick answer!
Now the output of lsmod is:
but I still have no interaction between tablet and laptop
$lsmod | grep wacom
wacom 29661 0
So I believe something went wrong during the installation of the driver, even if I didn't notice anytiìhing (except that warning).
Should I try to redo all the procedure or is there any method to check what went wrong??
Thank you again!
This is the content of /etc/modules:
# /etc/modules: kernel modules to load at boot time.
# This file contains the names of kernel modules that should be loaded
# at boot time, one per line. Lines beginning with "#" are ignored.