Hi,

sane-find-scanner can find the scanner on /dev/uscanner0, but don't know
the vendor and the model. output of sane-find-scanner is

----------------
found USB scanner (UNKNOWN vendor and product) at device /dev/uscanner0
---------------

output of "scanimage -L" is
----------------------------
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).
--------------------------

I tried to configure the backend 'plustek.conf' to provide vender ID and
product ID. But scanimage is still not working. "scanimage -L" just hangs
there and no output.

After setting the DEBUG environmental variable, the 'scanimage -L' outputs
a message of 'waiting for scanner-ready' and stucks there.
-----------------------------------------------------------
[sanei_debug] Setting debug level of plustek to 19.
[plustek] Plustek backend V0.51-12, part of sane-backends 1.0.18
[plustek] Retrieving all supported and conntected devices
[plustek] Checking for 0x07b3-0x0010
[plustek] Checking for 0x07b3-0x0011
[plustek] Checking for 0x07b3-0x0017
[plustek] Checking for 0x07b3-0x0015
[plustek] Checking for 0x07b3-0x0017
[plustek] Checking for 0x07b3-0x0013
[plustek] Checking for 0x07b3-0x0013
[plustek] Checking for 0x07b3-0x0011
[plustek] Checking for 0x07b3-0x0010
[plustek] Checking for 0x07b3-0x0014
[plustek] Checking for 0x07b3-0x0015
[plustek] Checking for 0x07b3-0x0014
[plustek] Checking for 0x07b3-0x0016
[plustek] Checking for 0x07b3-0x0017
[plustek] Checking for 0x07b3-0x0017
[plustek] Checking for 0x07b3-0x0007
[plustek] Checking for 0x07b3-0x000f
[plustek] Checking for 0x07b3-0x000f
[plustek] Checking for 0x07b3-0x0005
[plustek] Checking for 0x07b3-0x0014
[plustek] Checking for 0x07b3-0x0012
[plustek] Checking for 0x0400-0x1000
[plustek] Checking for 0x0400-0x1001
[plustek] Checking for 0x0400-0x1001
[plustek] Checking for 0x0458-0x2007
[plustek] Checking for 0x0458-0x2008
[plustek] Checking for 0x0458-0x2009
[plustek] Checking for 0x0458-0x2013
[plustek] Checking for 0x07b3-0x0011
[plustek] Checking for 0x07b3-0x0010
[plustek] Checking for 0x07b3-0x0014
[plustek] Checking for 0x07b3-0x0015
[plustek] Checking for 0x07b3-0x0014
[plustek] Checking for 0x07b3-0x0016
[plustek] Checking for 0x07b3-0x0017
[plustek] Checking for 0x07b3-0x0017
[plustek] Checking for 0x07b3-0x0007
[plustek] Checking for 0x07b3-0x000f
[plustek] Checking for 0x07b3-0x000f
[plustek] Checking for 0x07b3-0x0005
[plustek] Checking for 0x07b3-0x0014
[plustek] Checking for 0x07b3-0x0012
[plustek] Checking for 0x0400-0x1000
[plustek] Checking for 0x0400-0x1001
[plustek] Checking for 0x0400-0x1001
[plustek] Checking for 0x0458-0x2007
[plustek] Checking for 0x0458-0x2008
[plustek] Checking for 0x0458-0x2009
[plustek] Checking for 0x0458-0x2013
[plustek] Checking for 0x0458-0x2015
[plustek] Checking for 0x0458-0x2016
[plustek] Checking for 0x03f0-0x0505
[plustek] Checking for 0x03f0-0x0605
[plustek] Checking for 0x04b8-0x010f
[plustek] Checking for 0x04b8-0x011d
[plustek] Checking for 0x1606-0x0050
[plustek] Checking for 0x1606-0x0060
[plustek] Checking for 0x1606-0x0160
[plustek] Checking for 0x049f-0x001a
[plustek] Checking for 0x04a9-0x2206
[plustek] Checking for 0x04a9-0x2207
[plustek] Checking for 0x04a9-0x2208
[plustek] Checking for 0x04a9-0x220d
[plustek] Checking for 0x04a9-0x220e
[plustek] Checking for 0x04a9-0x2220
[plustek] Checking for 0x0a82-0x6620
[plustek] Available and supported devices:
[plustek] NONE.
[plustek] ># Plustek-SANE Backend configuration file<
[plustek] ># For use with LM9831/2/3 based USB scanners<
[plustek] >#<
[plustek] ><
[plustek] ># each device needs at least two lines:<
[plustek] ># - [usb] vendor-ID and product-ID<
[plustek] ># - device devicename<
[plustek] ># i.e. for Plustek (0x07B3) UT12/16/24 (0x0017)<
[plustek] ># [usb] 0x07B3 0x0017<
[plustek] ># device /dev/usbscanner<
[plustek] ># or<
[plustek] ># device libusb:bbb:ddd<
[plustek] ># where bbb is the busnumber and ddd the device number<
[plustek] ># make sure that your user has access to /proc/bus/usb/bbb/ddd<
[plustek] >#<
[plustek] ># additionally you can specify some options<
[plustek] ># warmup, lOffOnEnd, lampOff<
[plustek] >#<
[plustek] ># For autodetection use<
[plustek] >#[usb]<
[plustek] ># device /dev/usbscanner<
[plustek] >[usb] 0x04A9 0x220E<
[plustek] next device is a USB device (0x04A9-0x220E)
[plustek] ... next device
[plustek] >device /dev/uscanner0<
[plustek] Decoding device name >/dev/uscanner0<
[plustek] >#device auto<
[plustek] ><
[plustek] attach (/dev/uscanner0, 0xbfbfddb0, 0x0)
[plustek] Device configuration:
[plustek] device name  : >/dev/uscanner0<
[plustek] USB-ID       : >0x04A9-0x220E<
[plustek] model ovr.   : 0
[plustek] warmup       : -1s
[plustek] lampOff      : -1
[plustek] lampOffOnEnd : yes
[plustek] cacheCalData : no
[plustek] altCalibrate : no
[plustek] skipCalibr.  : no
[plustek] skipFine     : no
[plustek] skipFineWhite: no
[plustek] invertNegs.  : no
[plustek] dis.Speedup  : no
[plustek] pos_x        : 0
[plustek] pos_y        : 0
[plustek] pos_shading_y: -1
[plustek] neg_x        : 0
[plustek] neg_y        : 0
[plustek] neg_shading_y: -1
[plustek] tpa_x        : 0
[plustek] tpa_y        : 0
[plustek] tpa_shading_y: -1
[plustek] red gain     : -1
[plustek] green gain   : -1
[plustek] blue gain    : -1
[plustek] red offset   : -1
[plustek] green offset : -1
[plustek] blue offset  : -1
[plustek] red lampoff  : -1
[plustek] green lampoff: -1
[plustek] blue lampoff : -1
[plustek] red Gamma    : 1.00
[plustek] green Gamma  : 1.00
[plustek] blue Gamma   : 1.00
[plustek] gray Gamma   : 1.00
[plustek] ---------------------
[plustek] usbDev_open(/dev/uscanner0,0x04A9-0x220E) - 0x0
[plustek] Can't get vendor & product ID from driver...
[plustek] ... using the specified: 0x04A9-0x220E
[plustek] usbio_DetectLM983x
[plustek] usbio_DetectLM983x: found LM9832/3
[plustek]  * setting device to idle state!
[plustek] Detected vendor & product ID: 0x04A9-0x220E
[plustek] Device description for >0x04A9-0x220E< found.
[plustek] usb_initDev(42,0x04a9,-1)
[plustek] Device WAF  : 0x00000002
[plustek] Transferrate: 1000000 Bytes/s
[plustek] Device Flags: 0x00000000
[plustek] Vendor adjusted to: >Canon<
[plustek] LAMP-STATUS: 0x00000000
[plustek] RESETTING REGISTERS(-1) - 0x80
[plustek] SETTING THE MISC I/Os
[plustek] MISC I/O after RESET: 0x66, 0x16, 0x91
[plustek] Calibration file-names set to:
[plustek] >/home/c512/.sane/Canon-N1240U_LiDE30-coarse.cal<
[plustek] >/home/c512/.sane/Canon-N1240U_LiDE30-fine.cal<
[plustek] usb_SetScanParameters()
[plustek] * HDPI: 8.000
[plustek] * XDPI=150, HDPI=8.000
[plustek] * YDPI=150, MinDPIY=75
[plustek] * DataPixelStart=52, LineEnd=52
[plustek] >> End-Start=0, HDPI=8.00
[plustek] * Full Steps to Skip at Start = 0x0000
[plustek] * StepSize(Preset) = 144 (0x0090)
[plustek] * Scan calculations...
[plustek] * LineLength=10592, LineRateColor=3
[plustek] * Stepsize = 996, 0x46=0x03 0x47=0xe4
[plustek] * DPD =960 (0x03c0)
[plustek] * DPD =30816 (0x7860), step size=996, steps2rev=32
[plustek] * llen=10592, lineRateColor=3, qtcnt=8, hfcnt=8
[plustek] usb_GetMCLKDivider()
[plustek] usb_GetMCLKDiv()
[plustek] - lower mclkdiv limit=2.500000
[plustek] - upper mclkdiv limit=32.500000
[plustek] - hdpi          = 8.000
[plustek] - pixelbits     = 8
[plustek] - pixelsperline = 0
[plustek] - linelen       = 10592
[plustek] - transferrate  = 1000000
[plustek] - MCLK Divider  = 0
[plustek] - Current MCLK Divider = 2
[plustek] * Integration Time Adjust = 0 (HDPI=8.000,MCLKD=4.000)
[plustek] * Setting GreenPWMDutyCycleHigh
[plustek] * Current MCLK Divider = 4.000000
[plustek] * MOTOR-Settings: PWM=0x08, PWM_DUTY=0x1f
[plustek] * FFStepSize = 347, [0x48] = 0x01, [0x49] = 0x5b
[plustek] * PhyBytes   = 6
[plustek] * PhyLines   = 4
[plustek] * TotalBytes = 24
[plustek] * PL=295, coeffsize=216, scaler=3
[plustek] * PauseLimit = 2, [0x4e] = 0x01, [0x4f] = 0x01
[plustek] * Scansteps=72 (9*1200/150)
[plustek] usb_SetScanParameters() done.
[plustek] usbDev_getCaps()
[plustek] Scanner information:
[plustek] Vendor : Canon
[plustek] Model  : N1240U/LiDE30
[plustek] Flags  : 0x00000000
[plustek] drvclose()
[plustek] usbDev_stopScan()
[plustek] usbDev_ScanEnd(), start=0, park=0
[plustek] usbDev_close()
[plustek] attach: model = >N1240U/LiDE30<
[plustek] sane_get_devices (0xbfbfe6d8, 0)
device `plustek:/dev/uscanner0' is a Canon N1240U/LiDE30 USB flatbed
scanner
[plustek] sane_exit
[plustek] Shutdown called (dev->fd=-1, /dev/uscanner0)
[plustek] Waiting for scanner-ready...

-------------------------------------------------------------

Could anybody please help?

Thanks,
Xihong