A simple and useful answer to my question. It works. Thanks Till Kamppeter and Henning Meier-Geini wrote > Can you edit /etc/sane.d/dll.conf replacing the line "SnapScan" by > "snapscan" and then edit /etc/sane.d/snapscan.conf (no capital > letters) > to use the scanner on /dev/usb/scanner0? > > Then your scanner should work. >