[sane-devel] Help needed diagnosing strange failure to scan with Samsung SCX-4500W

[m. allan noah]

Try uninstalling or disabling your print driver, or anything else that
might be trying to talk to the scanner.

allan

On Thu, May 9, 2013 at 11:50 AM, Mike Cloaked <mike.cloaked at gmail.com> wrote:
> On Mon, May 6, 2013 at 9:12 PM, Mike Cloaked <mike.cloaked at gmail.com> wrote:
>>
>> I have a strange scanner failure to try to resolve, and I am hoping that
>> an expert on this list may be able to help me fix the problem.
>>
>> I have a Samsung SCX-4500W multifunction printer that is plugged in to the
>> usb port of my main machine running arch linux x86_64.  The printer part
>> works fine with the Splix driver, but the scanner fails to work.
>>
>> When I unplug the device and plug it into a laptop running arch linux, it
>> works fine. On a second laptop also running arch linux the scanner functions
>> also work fine (xsane). However plugging the same device back in to my main
>> desktop the scanner fails to work.
>>
>> Some information is as follows:
>>
>> sane-find-scanner works as either root or user and yields lines including:
>>
>> found USB scanner (vendor=0x04e8 [Samsung Electronics Co., Ltd.],
>> product=0x342b [SCX-4500W Series]) at libusb:001:007
>>   # Your USB scanner was (probably) detected. It may or may not be
>> supported by
>>   # SANE. Try scanimage -L and read the backend's manpage.
>>
>> scanimage -L works the first time I issue the command but then
>> subsequently fails:
>>
>> scanimage -L
>> device `xerox_mfp:libusb:001:006' is a Samsung Samsung SCX-4500W Series
>> multi-function peripheral
>>
>> scanimage -L
>>
>> 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).
>>
>> The device is listed correctly with the lsusb command:
>> Bus 001 Device 007: ID 04e8:342b Samsung Electronics Co., Ltd
>>
>>
>> The file /etc/sane.d/xerox_mfp.conf does have the correct line for the
>> device:
>> # Samsung SCX-4500W
>> usb 0x04e8 0x342b
>>
>> The system log files contain lines like:
>> May  6 16:43:27 localhost kernel: [ 8041.053060] usb 1-4: usbfs: interface
>> 1 claimed by usblp while 'xsane' sets config #1
>>
>> I have tried unplugging the device and replugging it but nothing I do ever
>> seems to make any difference.  I also removed the .sane directory from the
>> user and started from new and nothing changed.
>>
>> The udev rules file seems fine and in less
>> /lib64/udev/rules.d/53-sane.rules the lines relevant to the device are:
>>
>> # Samsung SCX-4500W
>> ATTRS{idVendor}=="04e8", ATTRS{idProduct}=="342b", MODE="0664",
>> GROUP="scanner", ENV{libsane_matched}="yes"
>>
>>
>> The system is fully up to date, and runs with systemd. The two laptops one
>> of which is x86_64 and the other i386 are both the same arch setup, and both
>> up to date. They work but the main machine does not.
>>
>> Can anyone suggest how I might be able to narrow down where the problem
>> may lie?
>>
>> Many thanks for any help.
>>
>>
> Having tried to follow up on the post I saw about the Pulstek OpticBook
> 3800, I tried to do something analogous but it did not seem to work so I
> probably did not have the correct syntax.
>
> However I tried (in arch linux):
>
> sudo sane-find-scanner
>
> which gave the device as:
> found USB scanner (vendor=0x04e8 [Samsung Electronics Co., Ltd.],
> product=0x342b [SCX-4500W Series]) at libusb:001:009
>
> Then I tried the command:
> sudo SANE_DEBUG_XEROX_MFP=256  scanimage -d xerox_mfp:libusb:001:009 -v -v
> -v -v -v 2> scan-debug-1.txt
>
> and the file contains:
>
> [sanei_debug] Setting debug level of xerox_mfp to 256.
> [xerox_mfp] sane_init: Xerox backend (build 13), version != null, authorize
> != null
> [xerox_mfp] sane_xerox_mfp_open: 'libusb:001:009'
> [xerox_mfp] sane_xerox_mfp_get_devices: (nil), 1
> [xerox_mfp] list_one_device: libusb:001:009
> [xerox_mfp] usb_dev_open: open 0x21e93c0
> [xerox_mfp] :: dev_command(INQUIRY[0x12], 70)
> [xerox_mfp] usb_dev_request: sanei_usb_read_bulk: Error during device I/O
> [xerox_mfp] dev_command: dev_request: Error during device I/O
> [xerox_mfp] usb_dev_close: closing dev 0x21e93c0
> [xerox_mfp] list_one_device: dev_inquiry(libusb:001:009): Error during
> device I/O
> scanimage: open of device xerox_mfp:libusb:001:009 failed: Invalid argument
> Calling sane_exit
> scanimage: finished
>
> Did I get the command syntax incorrect?  I would appreciate any help with
> this - but this seems to be unable to open the device so I don't know how to
> proceed to get some definitive information about that is going wrong.
>
> Thanks for any help.
>
>
>
> --
> mike c
>
> --
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