Hi Frank, > Scanimage works basically but the option "-duplex both" doesn't work and > "-mode Halftone" generates an "invalid argument" error. "-mode Lineart" > only generates inverse images (white characters on black paper).
I don't have a Fujitsu M3091 to try this. To get the reason of the "invalid argument" error you can set the environment variable "SANE_DEBUG_FUJITSU" to 20. Try to scan again and mail me the output. inverse image in mode lineart: According to the M3091 manual there is an option to inverse the image but it's not available in the driver. You can try to change the line set_WD_rif (buffer, s->reverse); to set_WID_rif (buffer, SANE_TRUE); in function setWindowParam() in file fujitsu.c If this works I can make this option available for the 3091. Oliver