Ubuntu 6.06

“Vuego 4300U”

  • Flatbed Scanner
  • 600 x 1200dpi (Windows?)
  • USB 1.0
  • Power pack 16VDC @ 1A
  • Center terminal on plug is Positive (+)/Outer terminal is Negative (-).


  1. Before plugging in: tail -f /var/log/messages
  2. When the scanner is recognised upon plugging it in, the following message appears:

    usb 5-2: new full speed USB device using uhci_hcd and address 2
  3. lsusb


    Bus 005 Device 001: ID 0000:0000
    Bus 001 Device 001: ID 0000:0000
    Bus 003 Device 001: ID 0000:0000
    Bus 002 Device 001: ID 0000:0000
    Bus 004 Device 002: ID 04a5:20b0 Acer Peripherals Inc. (now BenQ Corp.) S2W 3300U/4300U
    Bus 004 Device 001: ID 0000:0000
  4. Check /proc/bus/usb/devices to see if the scanner was recognised and loaded a driver – look for something after the "Driver=xxx" bit. None found in my case:

    T:  Bus=05 Lev=01 Prnt=01 Port=01 Cnt=01 Dev#=  2 Spd=12  MxCh= 0
    D:  Ver= 1.00 Cls=ff(vend.) Sub=ff Prot=ff MxPS= 8 #Cfgs=  1
    P:  Vendor=04a5 ProdID=20b0 Rev= 1.00
    S:  Manufacturer=Color
    S:  Product= FlatbedScanner 22
    C:* #Ifs= 1 Cfg#= 1 Atr=40 MxPwr=100mA
    I:  If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
    E:  Ad=81(I) Atr=02(Bulk) MxPS=  64 Ivl=0ms
    E:  Ad=02(O) Atr=02(Bulk) MxPS=   8 Ivl=0ms
    E:  Ad=83(I) Atr=03(Int.) MxPS=   8 Ivl=16ms

    (This section is redundant when using 2.6.x kernels???)

  5. As normal user, run xsane from a TerminalEmulator to see what it has to say.

    Error: Failed to open device 'snapscan:libusb:005:002': Invalid argument

    Note the numbers '5-2' from the tail(1) command, and also the '005:002' from xsane... this looks promising.

  6. Running snapscan from a TerminalEmulator:

    [snapscan] Cannot open firmware file /usr/share/sane/snapscan/your-firmwarefile.bin.
    [snapscan] Edit the firmware file entry in snapscan.conf.

    That directory does not even exist and it certainly doesn't contain a file called your-firmwarefile.bin, so...

  7. Let's find the firmware for the scanner. Open SystemAdministrationDevice Manager, scroll down/expand the tabs to the devices with names similar to:

    • "xxxxx (xxxx Family) USB UHCI"
    • "xxxxx (xxxx Family) USB2 EHCI"

    Look for a device that has names/numbers/model/etc. associated with your scanner.

    E.g. mine has "S2W 3300U/4300U" under "82801G (ICH7 Family) USB UHCI #4" tab.

    Click on that device, and then in the right pane, click on 'Advanced', which shows heaps of stuff.

    Look for the two lines that have the following:

    • "usb_device.product_id"
    • "usb_device.vendor_id"

    Mine looks like:

    • "usb_device.product_id int 8368 (0x20b0)"
    • "usb_device.vendor_id int 1189 (0x4a5)"

    Do a Google search, or look on for the product_id/vendor_id (e.g. '0x20b0' and/or 0x4a5'). I found Acer / Benq 3300 / 4300 USB 0x04a5, 0x20b0 "FlatbedScanner23" u176v046.bin.

    I found u176v046.bin inside the MicrosoftWindows DeviceDriver files for the scanner.

  8. Put the firmware in the right place:

    mkdir /usr/share/sane/snapscan
    cp u176v046.bin /usr/share/sane/snapscan
    chmod -R a=r,a+X,u+w /usr/share/sane/snapscan

    Now edit /etc/sane.d/snapscan.conf to point the configuration at your binary firmware file.

  9. As a normal user, run xsane. This should now work.

See also


  • Ensure each part is in the correct order, e.g. loading firmware we haven't located yet, etc. (sanity check? :-) )

    • Check USB is configured OK
    • Identify Scanner
    • Check to see if Scanner is recognised by USB system
    • Identify/locate/download firmware for scanner
    • Install firmware file(s)
    • Configure snapscan? to upload firmware
    • See if Scanner is recognised and loads
    • Test if scanner works
    • Ensure scanner works the same through a cold boot of PC and scanner !
  • Space things out more - looks too cluttered
  • Remove irrelevant/obsolete commands
  • Add more links
  • Learn how to do Wiki pages better, so others can understand them!!!
  • If this To-Do list is still here, feel free to pester the Author :-)