Using libusb I get no errors. So the bug seems to be with the kernel scanner driver.
I noticed two system things. First /sbin/hotplug is now called every time I do a scanimage -L or -f. Second every time I switch the scanner on or off the device number gets incremented. scanimage -L now works. (worked not in sane-backend-1.0.12) device `epson:libusb:002:005' is a Epson Perfection1640 flatbed scanner The ADF is not detectable ? scanimage -d epson:libusb:002:005 --test works too. scanimage -d epson:libusb:002:005 --source 'Automatic Document Feeder' does _not_ work. After a long time I get .. scanimage: sane_start: Error during device I/O Any ideas ? -- Klaus