udl4

Usage

Overview

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

Toshiba Video Dock

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 uncompressed mode.