Ok, thanks for reply, now take a look at the following, maybe you could find something into it
*scanimage --list-devicesdevice `kyocera_gdi_a3:libusb:001:029' is a Kyocera TASKalfa 1800 multi-functional device* So scanimage list the device as *kyocera_gdi_a3 *but when I test it as scanimage -d kyocera_gdi_a3 -T *Output format is not set, using pnm as a default.scanimage: open of device kyocera_gdi_a3 failed: Invalid argument* So there is no luck in it further without any argument SANE_DEBUG_KYOCERA_GDI_A3=255 scanimage -T Output format is not set, using pnm as a default. [kyocera_debug] Setting debug level of kyocera_gdi_a3 to 255. [kyocera_gdi_a3] >>sane_init [kyocera_gdi_a3] sane_init() : Kyocera backend (build 1), version != null, authorize != null [kyocera_gdi_a3] <<sane_init [kyocera_gdi_a3] >>sane_get_devices [kyocera_gdi_a3] sane_get_devices() : start reading config file kyocera_gdi_a3.conf [kyocera_gdi_a3] sane_get_devices() : usb 0x0482 0x0606 [kyocera_gdi_a3] attach_one_usb() [kyocera_gdi_a3] attach_one() [kyocera_gdi_a3] connect_scanner() : INFO : connecting usb scanner device libusb:001:029 [kyocera_gdi_a3] connect_scanner() : successfully connected to usb scanner [kyocera_gdi_a3] attach_one() : vendor 0x482, product 0x606 [kyocera_gdi_a3] sane_get_devices() : usb 0x0482 0x0607 [kyocera_gdi_a3] sane_get_devices() : usb 0x0482 0x0608 [kyocera_gdi_a3] sane_get_devices() : usb 0x0482 0x0609 [kyocera_gdi_a3] sane_get_devices() : finished reading config file kyocera_gdi_a3.conf [kyocera_gdi_a3] sane_get_devices() : found Kyocera scanner in libusb:001:029 [kyocera_gdi_a3] sane_get_devices() : Kyocera scanners found 1 [kyocera_gdi_a3] <<sane_get_devices [kyocera_gdi_a3] >>sane_open [kyocera_gdi_a3] get_device_from_name() : name = libusb:001:029 scanimage: open of device kyocera_gdi_a3:libusb:001:029 failed: Invalid argument [kyocera_gdi_a3] >>sane_exit [kyocera_gdi_a3] disconnect_scanner() : INFO : disconnected usb scanner device libusb:001:029 [kyocera_gdi_a3] <<sane_exit I think there is problem in naming the scanner as it's not working with *scanimage -d [devicename]* where devicename I have tried are kyocera, Kyocera_gdi_a3, Kyocera Taskalfa 1800, libusb:001:029 etc. On Mon, Apr 25, 2022 at 10:34 PM Ralph Little <skelb...@gmail.com> wrote: > Hi, > > On Mon, Apr 25, 2022 at 12:27 AM jitesh pandey <jsjpan...@gmail.com> > wrote: > >> Sorry for the late reply, the output of my (having Kyocera Taskalfa) is >> as follows: >> >> SANE_DEBUG_KYOCERA_GDI_A3=255 scanimage -L >> [kyocera_debug] Setting debug level of kyocera_gdi_a3 to 255. >> [kyocera_gdi_a3] >>sane_init >> [kyocera_gdi_a3] sane_init() : Kyocera backend (build 1), version != >> null, authorize != null >> [kyocera_gdi_a3] <<sane_init >> [kyocera_gdi_a3] >>sane_get_devices >> [kyocera_gdi_a3] sane_get_devices() : start reading config file >> kyocera_gdi_a3.conf >> [kyocera_gdi_a3] sane_get_devices() : usb 0x0482 0x0606 >> [kyocera_gdi_a3] attach_one_usb() >> [kyocera_gdi_a3] attach_one() >> [kyocera_gdi_a3] connect_scanner() : INFO : connecting usb scanner device >> libusb:001:071 >> [kyocera_gdi_a3] connect_scanner() : successfully connected to usb scanner >> [kyocera_gdi_a3] attach_one() : vendor 0x482, product 0x606 >> [kyocera_gdi_a3] sane_get_devices() : usb 0x0482 0x0607 >> [kyocera_gdi_a3] sane_get_devices() : usb 0x0482 0x0608 >> [kyocera_gdi_a3] sane_get_devices() : usb 0x0482 0x0609 >> [kyocera_gdi_a3] sane_get_devices() : finished reading config file >> kyocera_gdi_a3.conf >> [kyocera_gdi_a3] sane_get_devices() : found Kyocera scanner in >> libusb:001:071 >> [kyocera_gdi_a3] sane_get_devices() : Kyocera scanners found 1 >> [kyocera_gdi_a3] <<sane_get_devices >> device `kyocera_gdi_a3:libusb:001:071' is a Kyocera TASKalfa 1800 >> multifunction device >> [kyocera_gdi_a3] >>sane_exit >> [kyocera_gdi_a3] disconnect_scanner() : INFO : disconnected usb scanner >> device libusb:001:071 >> [kyocera_gdi_a3] <<sane_exit >> >> where the line *[kyocera_gdi_a3] disconnect_scanner() : INFO : >> disconnected usb scanner device libusb:001:071 *is the problem according >> to me. >> > > That all looks OK. scanimage -L will just probe for devices and list those > found. > Perhaps generate some diag output with SANE_DEBUG_KYOCERA_GDI_A3 from > scanimage when attempting to do a basic scan? > > Cheers, > Ralph >