[sane-devel] Debugging sane-find-scanner/scanimage

Thu May 31 15:35:43 UTC 2012

Is this machine big-endian cpu?

allan

On Thu, May 31, 2012 at 11:23 AM, Rogan Dawes <rogan at dawes.za.net> wrote:
> [Resending due to no responses after more than a week]
>
> Hi folks,
>
> I am using SANE (scanimage (sane-backends) 1.0.22; backend version
> 1.0.22) on OpenWRT Backfire 10.3.1 on a Buffalo WZR-HP-G300NH,
> attempting to interface with a Samsung SCX4300 MFP.
>
> This device is supported by the xerox_mfp backend, and has worked in the
> past. Now, for some odd reason, it is failing to detect the scanner.
>
> Here is the debugging output I have managed to obtain:
>
> root at gw:/# SANE_DEBUG_XEROX_MFP=128  SANE_DEBUG_SANEI_USB=4
> sane-find-scanner
>
>  # sane-find-scanner will now attempt to detect your scanner. If the
>  # result is different from what you expected, first make sure your
>  # scanner is powered up and properly connected to your computer.
>
>  # No SCSI scanners found. If you expected something different, make
> sure that
>  # you have loaded a kernel SCSI driver for your SCSI adapter.
>  # Also you need support for SCSI Generic (sg) in your operating system.
>  # If using Linux, try "modprobe sg".
>
> [sanei_debug] Setting debug level of sanei_usb to 4.
> [sanei_usb] sanei_usb_init: marking existing devices
> [sanei_usb] sanei_usb_init: Looking for kernel scanner devices
> [sanei_usb] sanei_usb_init: Looking for libusb devices
> [sanei_usb] sanei_usb_init: found libusb device (0x067b/0x2303)
> interface 0  at libusb:001:007
> [sanei_usb] store_device: add dn 0 with libusb:001:007
> [sanei_usb] sanei_usb_init: found libusb device (0x04e8/0x342e)
> interface 0  at libusb:001:006
> [sanei_usb] store_device: add dn 1 with libusb:001:006
> [sanei_usb] sanei_usb_open: can't find device `/dev/usb/scanner' in list
> [sanei_usb] sanei_usb_open: can't find device `/dev/usb/scanner0' in list
> [sanei_usb] sanei_usb_open: can't find device `/dev/usb/scanner1' in list
> [sanei_usb] sanei_usb_open: can't find device `/dev/usb/scanner2' in list
> [sanei_usb] sanei_usb_open: can't find device `/dev/usb/scanner3' in list
> [sanei_usb] sanei_usb_open: can't find device `/dev/usb/scanner4' in list
> [sanei_usb] sanei_usb_open: can't find device `/dev/usb/scanner5' in list
> [sanei_usb] sanei_usb_open: can't find device `/dev/usb/scanner5' in list
> [sanei_usb] sanei_usb_open: can't find device `/dev/usb/scanner7' in list
> [sanei_usb] sanei_usb_open: can't find device `/dev/usb/scanner8' in list
> [sanei_usb] sanei_usb_open: can't find device `/dev/usb/scanner9' in list
> [sanei_usb] sanei_usb_open: can't find device `/dev/usb/scanner10' in list
> [sanei_usb] sanei_usb_open: can't find device `/dev/usb/scanner11' in list
> [sanei_usb] sanei_usb_open: can't find device `/dev/usb/scanner12' in list
> [sanei_usb] sanei_usb_open: can't find device `/dev/usb/scanner13' in list
> [sanei_usb] sanei_usb_open: can't find device `/dev/usb/scanner14' in list
> [sanei_usb] sanei_usb_open: can't find device `/dev/usb/scanner15' in list
> [sanei_usb] sanei_usb_open: can't find device `/dev/usbscanner' in list
> [sanei_usb] sanei_usb_open: can't find device `/dev/usbscanner0' in list
> [sanei_usb] sanei_usb_open: can't find device `/dev/usbscanner1' in list
> [sanei_usb] sanei_usb_open: can't find device `/dev/usbscanner2' in list
> [sanei_usb] sanei_usb_open: can't find device `/dev/usbscanner3' in list
> [sanei_usb] sanei_usb_open: can't find device `/dev/usbscanner4' in list
> [sanei_usb] sanei_usb_open: can't find device `/dev/usbscanner5' in list
> [sanei_usb] sanei_usb_open: can't find device `/dev/usbscanner6' in list
> [sanei_usb] sanei_usb_open: can't find device `/dev/usbscanner7' in list
> [sanei_usb] sanei_usb_open: can't find device `/dev/usbscanner8' in list
> [sanei_usb] sanei_usb_open: can't find device `/dev/usbscanner9' in list
> [sanei_usb] sanei_usb_open: can't find device `/dev/usbscanner10' in list
> [sanei_usb] sanei_usb_open: can't find device `/dev/usbscanner11' in list
> [sanei_usb] sanei_usb_open: can't find device `/dev/usbscanner12' in list
> [sanei_usb] sanei_usb_open: can't find device `/dev/usbscanner13' in list
> [sanei_usb] sanei_usb_open: can't find device `/dev/usbscanner14' in list
> [sanei_usb] sanei_usb_open: can't find device `/dev/usbscanner15' in list
> found USB scanner (vendor=0x067b [Prolific Technology Inc.],
> product=0x2303 [USB-Serial Controller]) at libusb:001:007
> found USB scanner (vendor=0x04e8 [Samsung], product=0x342e [SCX-4300
> Series]) at libusb:001:006
>  # Your USB scanner was (probably) detected. It may or may not be
> supported by
>  # SANE. Try scanimage -L and read the backend's manpage.
>
>  # Not checking for parallel port scanners.
>
>  # Most Scanners connected to the parallel port or other proprietary ports
>  # can't be detected by this program.
> root at gw:/#
>
>
> As can be seen above, sane-find-scanner identifies the USB device
> representing the SCX4300.
>
> My dll.conf contains:
>
> root at gw:/# cat /etc/sane.d/dll.conf
> xerox_mfp
> root at gw:/#
>
> And my xerox_mfp.conf contains:
>
> root at gw:/# cat /etc/sane.d/xerox_mfp.conf
> #xerox_mfp.conf
>
> # Samsung SCX-4300
> usb 0x04e8 0x342e
> root at gw:/#
>
> scanimage -L, however, fails to identify this device:
>
> root at gw:/# SANE_DEBUG_XEROX_MFP=128  SANE_DEBUG_SANEI_USB=4 scanimage -L
> [sanei_debug] Setting debug level of xerox_mfp to 128.
> [xerox_mfp] sane_init: Xerox backend (build 12), version != null,
> authorize != null
> [sanei_debug] Setting debug level of sanei_usb to 4.
> [sanei_usb] sanei_usb_init: marking existing devices
> [sanei_usb] sanei_usb_init: Looking for kernel scanner devices
> [sanei_usb] sanei_usb_init: Looking for libusb devices
> [sanei_usb] sanei_usb_init: found libusb device (0x067b/0x2303)
> interface 0  at libusb:001:007
> [sanei_usb] store_device: add dn 0 with libusb:001:007
> [sanei_usb] sanei_usb_init: found libusb device (0x04e8/0x342e)
> interface 0  at libusb:001:006
> [sanei_usb] store_device: add dn 1 with libusb:001:006
> [xerox_mfp] sane_xerox_mfp_get_devices: 0x7fcb5f60, 0
> [sanei_usb] sanei_usb_find_devices: vendor=0x04e8, product=0x342e
> [xerox_mfp] list_one_device: libusb:001:006
>
> No scanners were identified. If you were expecting something different,
> check that the scanner is plugged in, turned on and detected by the
> sane-find-scanner tool (if appropriate). Please read the documentation
> which came with this software (README, FAQ, manpages).
> root at gw:/#
>
> It seems to notice the existence of the device, reporting:
>
> [xerox_mfp] list_one_device: libusb:001:006
>
> but it does nothing more than that.
>
> Does anyone have suggestions as to what I can try to debug this further?
>
> Many thanks
>
> Rogan Dawes
>
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