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UDL(4)		       FreeBSD 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)

HISTORY
     The udl driver first appeared in OpenBSD 4.6.

AUTHORS
     Marcus Glocker <mglocker@openbsd.org>

FreeBSD	13.0		       October 17, 2017			  FreeBSD 13.0

NAME | SYNOPSIS | DESCRIPTION | HARDWARE | FILES | SEE ALSO | HISTORY | AUTHORS

Want to link to this manual page? Use this URL:
<https://www.freebsd.org/cgi/man.cgi?query=udl&sektion=4&manpath=OpenBSD+6.9>

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