Ubuntu 14.04 and LT1421 - black screen

[Shadow2334]

Hi all, I have a problem with connecting LT1421 to Ubuntu 14.04.01. I downloaded newest drivers from DisplayLink website, installed step by step according this manual: http://support.displaylink.com/knowledgebase/articles/684649-how-to-install-displaylink-software-on-ubuntu

but it shows only black screen.

update, upgrade and dist-upgrade already done.

dmsg says this:


[ 385.035567] usb 1-1: new high-speed USB device number 3 using ehci-pci
[ 385.391498] usb 1-1: New USB device found, idVendor=17e9, idProduct=03e0
[ 385.391505] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 385.391507] usb 1-1: Product: Lenovo LT1421 wide
[ 385.391509] usb 1-1: Manufacturer: DisplayLink
[ 385.391511] usb 1-1: SerialNumber: 6V9CHDG9
[ 385.399108] [drm] vendor descriptor length:17 data:17 5f 01 00 15 05 00 01 03 00 04
[ 385.792728] udl 1-1:1.0: fb3: udldrmfb frame buffer device
[ 385.792734] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 385.792736] [drm] No driver support for vblank timestamp query.
[ 385.792739] [drm] Initialized udl on minor 3
[ 385.831167] [D] evdi_detect Painter is disconnected
[ 385.832991] [D] evdi_detect Painter is disconnected
[ 385.840739] [D] evdi_detect Painter is disconnected
[ 386.262437] [D] evdi_detect Painter is disconnected
[ 386.263054] [D] evdi_detect Painter is disconnected
[ 386.263538] [D] evdi_detect Painter is disconnected
[ 386.668883] [D] evdi_detect Painter is disconnected
[ 388.880960] [D] evdi_painter_connect (dev=2) Connected with ffff88007919c000
[ 388.881025] [D] evdi_painter_connect (dev=2) Edid (3 bytes): 00 ff ff
[ 388.881033] [D] evdi_detect (dev=2) Painter is connected
[ 389.298588] [D] evdi_detect (dev=2) Painter is connected
[ 389.299002] [D] evdi_detect (dev=2) Painter is connected
[ 389.299005] [D] evdi_painter_get_edid (dev=2) 00 ff ff


Thanks for any help.