issue:
  
# dmesg | grep scann
uscanner0 at uhub0 port 2
uscanner0: UMAX Data Systems Astra 1220U, rev 1.00/1.00, addr 2
  
# usbdevs -v
Controller /dev/usb0:
addr 1: full speed, self powered, config 1, UHCI root hub(0x0000), 
Intel(0x8086), rev 1.00
 port 1 powered
 port 2 addr 2: full speed, self powered, config 1, Astra 1220U(0x0010), UMAX 
Data Systems(0x1606), rev 1.00
  
# 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 SCSI driver for your SCSI adapter.

found USB scanner (UNKNOWN vendor and product) at device /dev/uscanner0
  # Your USB scanner was detected. It may or may not be supported by
  # SANE. Try scanimage -L and read the backend's manpage.
  # `UNKNOWN vendor and product' means that there seems to be a scanner at this
  # device file but the vendor and product ids couldn't be identified.
  # Currently identification only works with Linux versions >= 2.4.8. You may
  # need to configure your backend manually, see 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.
  
# cat /etc/sane.d/umax1220u.conf                                                
                                             
# Options for the umax1220u backend

# Autodetect the UMAX Astra 1220U
usb 0x1606 0x0010
# The following line enables autodetection for the
# Astra 2000U and Astra 2100U. However, this driver
# isn't entirely compatible, so expect color problems :)
#usb 0x1606 0x0030
#usb 0x1606 0x0130
  
# device list for non-linux-systems (enable if autodetect fails):
#/dev/scanner
#/dev/usb/scanner0
usb /dev/uscanner0



# export SANE_DEBUG_UMAX1220U=255

# scanimage -L
[sanei_debug] Setting debug level of umax1220u to 255.
[umax1220u] sane_init: version_code != 0, authorize != 0
[umax1220u] sane_init: SANE umax1220u backend version 1.0.1 from sane-backends 
1.0.16
[umax1220u] reading configure file umax1220u.conf
[umax1220u] attach_matching_devices(usb 0x1606 0x0010)
[umax1220u] attach_matching_devices(usb /deb/uscanner0)
[umax1220u] finished reading configure file
[umax1220u] sane_get_devices(local_only = 0)

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).
[umax1220u] sane_exit

# scanimage -d umax1220u:/dev/uscanner0
[sanei_debug] Setting debug level of umax1220u to 255.  
[umax1220u] sane_init: version_code != 0, authorize != 0
[umax1220u] sane_init: SANE umax1220u backend version 1.0.1 from sane-backends 
1.0.16
[umax1220u] reading configure file umax1220u.conf
[umax1220u] attach_matching_devices(usb 0x1606 0x0010) 
[umax1220u] attach_matching_devices(usb /deb/uscanner0)
[umax1220u] finished reading configure file 
[umax1220u] sane_open
[umax1220u] sane_open: devicename=/dev/uscanner0
[umax1220u] attach_scanner: /dev/uscanner0
[umax1220u] attach_scanner: opening /dev/uscanner0
[umax1220u] UMAX_open_device: `/dev/uscanner0'
[umax1220u] UMAX_open_device: sanei_usb_get_vendor_product failed
[umax1220u] ERROR: attach_scanner: opening /dev/uscanner0 failed
scanimage: open of device umax1220u:/dev/uscanner0 failed: Operation not 
supported
[umax1220u] sane_exit




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