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

[Rogan Dawes]

On 31/05/2012 17:35, m. allan noah wrote:
> Is this machine big-endian cpu?
>
> allan

Hi Allan,

It is ARM, which I believe is Little Endian.

Rogan

>
> 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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>
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