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UDL(4)                   BSD Kernel Interfaces Manual                   UDL(4)

NAME
     udl -- DisplayLink DL-120 / DL-160 USB display devices

SYNOPSIS
     udl* at uhub?
     wsdisplay* at udl?

DESCRIPTION
     The udl driver supports USB display devices based on the DisplayLink
     DL-120 / DL-160 graphic chip.

HARDWARE
     The following devices should work:

           Century Corp. Japan Plus One LCD-8000U
           Century Corp. Japan Plus One LCD-4300U
           DisplayLink USB to DVI
           ForwardVideo EasyCAP008 USB to DVI
           HP USB 2.0 Docking Station (FQ834)
           HP USB Graphics Adapter (NL571)
           IOGEAR USB 2.0 External DVI (GUC2020)
           Koenig CMP-USBVGA10 and CMP-USBVGA11
           Lenovo 45K5296 USB to DVI
           Lenovo ThinkVision LT1421
           Lilliput UM-70
           Nanovision MiMo UM-710 and UM-740
           Rextron VCUD60 USB to DVI
           Samsung LD220
           StarTech CONV-USB2DVI
           Sunweit USB to DVI
           Unitek Y-2240 USB to DVI
           VideoHome NBdock1920

FILES
     The device can process compressed data (Huffman pixel difference method)
     to reduce the USB payload.  To generate the compressed data, the driver
     needs to load a Huffman table, which is stored in the following binary
     file:

           /etc/firmware/udl_huffman

     If the Huffman table can't be loaded, the driver will fall back to uncom-
     pressed mode.

SEE ALSO
     intro(4), usb(4), wscons(4), wsdisplay(4)

BSD                           September 18, 2012                           BSD