Ho rimosso l'installazione precedente.
Adesso con il comando scanimage -L
[mauro[member=806]mauro[/member]-manjaro ~]$ scanimage -L
No scanners were identified. If you were expecting something different,
check that the scanner is plugged in, turned on and detected by the
sane-find-scanner tool (if appropriate). Please read the documentation
which came with this software (README, FAQ, manpages).
[mauro[member=806]mauro[/member]-manjaro ~]$