Provided by: libsane-common_1.0.27-1~experimental3ubuntu2_all bug


       sane-mustek_usb - SANE backend for Mustek USB flatbed scanners


       The  sane-mustek_usb  library  implements  a  SANE  (Scanner Access Now Easy) backend that
       provides access to Mustek USB  flatbed  scanners  (including  a  clone  from  Trust).   At
       present, the following scanners are known to work more or less with this backend:

              Mustek 600 CU
              Mustek 1200 UB
              Mustek 1200 CU
              Mustek 1200 CU Plus
              Trust Compact Scan USB 19200

       More    details    can    be    found    on    the    Mustek    USB    backend    homepage

       The Mustek BearPaw 1200 and 2400 scanners  are  supported  by  the  plustek  backend.  See
       sane-plustek(5) for details. The Mustek BearPaw 1200F is supported by the MA-1509 backend.
       See sane-ma1509(5) for details. Other Mustek USB scanners  are  supported  by  the  gt68xx
       backend, see sane-gt68xx(5).

       This  backend  can  only  work  with  scanners  that are already detected by the operating
       system. See sane-usb(5) for details.

       If you own a Mustek (or Trust) scanner other than the ones listed above  that  works  with
       this  backend,  please  let me know this by sending the scanner's exact model name and the
       USB vendor and device ids (e.g. from /proc/bus/usb/devices or syslog) to me.


       This backend expects device names of the form:


       Where special is a path-name for the special device that corresponds  to  a  USB  scanner.
       With  Linux,  such  a  device  name  could  be  /dev/usb/scanner0 or /dev/usbscanner1, for

       For FreeBSD use /dev/uscanner0.


       The contents of the mustek_usb.conf file is a  list  of  options  and  device  names  that
       correspond  to  Mustek  USB scanners.  Empty lines and lines starting with a hash mark (#)
       are ignored. If a device name is placed in mustek_usb.conf, it must be followed by a  line
       containing  the  keyword  option  and an option specifying the scanner type. The following
       options can be used: 600cu, 1200cu, 1200cu_plus, 1200ub.  For the Trust Compact  Scan  USB
       19200 use `option 1200ub'.

       Instead  of  using  the  device  name,  the  scanner  can be autodetected by usb vendor_id
       product_id statements which are already  included  into  mustek_usb.conf.   This  is  only
       supported with Linux 2.4.8 and higher and all systems that support libsub. "vendor_id" and
       "product_id" are hexadecimal numbers that identify the scanner. If this  doesn't  work,  a
       device  name  and the option specifying the scanner type must be placed in mustek_usb.conf
       as described above.

       The global option max_block_size can be used to limit the amount of data acquired  in  one
       turn from the USB system. It may be worth trying, if USB errors occur.

       A sample configuration file is shown below:

              # Comment
              option max_block_size 1024
              usb 0x055f 0x0001
              option 600cu

       The  first  line  is  ignored.  The  second line sets the buffer size to a maximum of 1024
       bytes.  The third line tries to autodetect a scanner with vendor id 0x055f and product  id
       0x0001  (Mustek 1200 CU). The fourth line tells the backend to attach to /dev/usb/scanner0
       and the fifth line specifies that /dev/usb/scanner0 is a Mustek 600 CU.


              The backend configuration file (see also description of SANE_CONFIG_DIR below).

              The static library implementing this backend.

              The shared library implementing this  backend  (present  on  systems  that  support
              dynamic loading).


              This  environment  variable  specifies the list of directories that may contain the
              configuration file.  Under UNIX, the directories are separated by  a  colon  (`:'),
              under OS/2, they are separated by a semi-colon (`;').  If this variable is not set,
              the configuration file is searched in two default directories: first,  the  current
              working  directory  (".") and then in @CONFIGDIR@.  If the value of the environment
              variable ends with the directory separator character, then the default  directories
              are  searched  after  the  explicitly  specified directories.  For example, setting
              SANE_CONFIG_DIR to "/tmp/config:" would result in  directories  "tmp/config",  ".",
              and "@CONFIGDIR@" being searched (in this order).

              If  the  library was compiled with debug support enabled, this environment variable
              controls the debug level for  this  backend.   Higher  debug  levels  increase  the
              verbosity of the output.

              Value  Description
              0      no output
              1      print fatal errors
              2      print important messages
              3      print non-fatal errors and less important messages
              4      print all but debugging messages
              5      print high level debugging messages
              6      print medium level debugging messages
              7      print low level debugging messages

              Example: export SANE_DEBUG_MUSTEK_USB=4


       sane(7),  sane-usb(5), sane-mustek(5), sane-mustek_pp(5), sane-plustek(5), sane-gt68xx(5),


       Henning Meier-Geinitz <>
       This backend is based on the Mustek 1200ub backend from Mustek, maintained by Tom Wang.


       These devices have a hardware bug: Once data is written  to  them,  they  can't  be  reset
       (toggle  = DATA0). That means, any operation that tries to reset the device will result in
       running into timeouts.

       In earlier versions this backend failed when  it  was  loaded  the  second  time  in  some
       configurations. The only choice was to replug the scanner in this case. The backend uses a
       workaround for that bug now but it's only tested on Linux.  Reports  for  other  operating
       systems are appreciated.

       More   detailed   bug   information   is   available   at   the  Mustek  backend  homepage

@PACKAGEVERSION@                           13 Jul 2008                         sane-mustek_usb(5)