If the installation of the driver succeeded so far, its now time to check if the driver can identify and access the scanner. (For this again you needn't be logged in as root. I do so again because I did in all the other examples too.) So you log in and try to invoke scanimage -L. This command should make the SANE list all the scanners if can find. On my system that produces output of the following form:
Welcome to SuSE Linux 7.2 (i386) - Kernel 2.4.7 (tty2). mathplanet login: root Password: Last login: Wed Sep 19 05:38:30 on tty2 Have a lot of fun... mathplanet:~ # scanimage -L device `plustek:/dev/pt_drv' is a Plustek 9636T/12000T flatbed scanner mathplanet:~ #And that's exactly correct, for there is a Plustek OpticPro 12000T attached to my parallel port and that's the only scanner (currently) connected. Fine. In some cases it might occur that the scanner type detected is not identical to the scanner type connected. Sometimes this is due to the fact, that one scanner is internally exactly the same as the detected one, so that this is perfectly fine. Other times this might be due to incorrect scanner detection. If you get a problem of this kind you might try to change the mov=0 parameter mentioned above in the section 3.4 to some better value. More about this can be read on the man page. (Use man sane-plustek on a command line.