UDL(4) | Device Drivers Manual | UDL(4) |
udl
— DisplayLink
DL-120 / DL-160 USB display devices
udl* at uhub?
wsdisplay* at udl?
The udl
driver supports USB display
devices based on the DisplayLink DL-120 / DL-160 graphic chip.
The following devices should work:
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:
If the Huffman table can't be loaded, the driver will fall back to uncompressed mode.
The udl
driver first appeared in
OpenBSD 4.6.
Marcus Glocker <mglocker@openbsd.org>
October 17, 2017 | OpenBSD-6.8 |