Comment 8 for bug 892915

I can also confirm this with the Samsung CLX-6220FX on 13.04 Raring. As 'mtu' says, the scanner driver requires the option

--doc-source "ADF Duplex - Long-Edge Binding"

for conventional printed letters or

The options it accepts - vis the Samsung Unified driver - are:

$ scanimage --help --device-name "smfp:SAMSUNG CLX-6220 Series on 10.254.251.4"
...
Options specific to device `smfp:SAMSUNG CLX-6220 Series on 10.254.251.4':
    --preview[=(yes|no)] [no]
        Requests a preview-quality scan
  Image Quality:
    --mode Black and White - Line Art|Black and White - Halftone|Grayscale - 256 Levels|Color - 16 Million Colors [Color - 16 Million Colors]
        Sets the color composition mode of the scanned image
    --resolution 75|100|150|200|300|600|1200dpi [300]
        Sets the resolution of the scanned image
  Scan Area:
    --page-format Statement - 5.5"x8.5"|Statement (Rotated) - 8.5"x5.5"|A5 - 148x210 mm|A5 (Rotated) - 210x148 mm|B5 (JIS) - 182x257 mm|Executive - 7.25"x10.5"|A4 - 210x297 mm|Letter - 8.5"x11"|Legal - 8.5"x14"|Folio - 8.5"x13"|Custom [A4 - 210x297 mm]
        Sets the paper format of the scanned page
    -l 0..215mm [0]
        Sets left position of the scan area
    -t 0..355mm [0]
        Sets top position of the scan area
    -x 0..215mm [210]
        Width of scan-area.
    -y 0..355mm [297]
        Height of scan-area.
    --doc-source Flatbed|ADF Simplex|ADF Duplex - Long-Edge Binding|ADF Duplex - Short-Edge Binding [Flatbed]
        Selects source of the document to be scanned

Type ``scanimage --help -d DEVICE'' to get list of all options for DEVICE.