maniak@testman:~$ 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).

maniak@testman:~$ sudo scanimage -L
device `gt68xx:libusb:002:002' is a Mustek BearPaw 1200 TA flatbed scanner