No parallel port and USB scanners are supported and there are no plans to support them in the future. Don't expect this to work correctly.
Many functions are missing, others contain errors.
In some cases, your computer might even hang. The special device name must be a generic SCSI device or a symlink to such a device. The contents of the canon.conf file is a list of device names that correspond to Canon scanners. Only one device name can be listed in canon.conf . After that, the real scanning pass takes place.