i am running usb fujitsu scanner on linux 2.4.21. the fujitsu backend uses sanei_usb, so both the kernel scanner driver, and libusb work. however, libusb causes a long pause, and a couple of timeouts happen, before the scanner starts. after that, the multi-page (adf) scans proceed normally, with no other errors.
so i did two scans with SADE_DEBUG_SANEI_USB=255, one with kernel scanner driver, one with libusb, and i compaired the parts prior to the pause using libusb. the usb packets, and the order they are sent in are the same. so, it would seem to be lower level than the backend. anyone know how can i get more debugging info from the kernel scanner driver and libusb, so that i can see exactly what packets are going out to the device, and what sort of time signature they have? allan -- "so don't tell us it can't be done, putting down what you don't know. money isn't our god, integrity will free our souls" - Max Cavalera
