Problem with DisplayLink after update: ubuntu 14.04

[Julz]

I installed the Linux driver to use the Dell docking station D3100 a few weeks ago and everything was working fine,... until my last update of the OS yesterday. I am running ubuntu 14.04 on a Dell Latitude E5250. This morning, the external monitor connected to the docking station is not working anymore. Actually, the docking station itself is not recognised.

dmesg now gives:
[ 442.320440] evdi: module verification failed: signature and/or required key missing - tainting kernel
[ 442.321117] [ ] evdi_init Initialising logging on level 5

The docking system is not found by lsusb:

Bus 003 Device 003: ID 1bcf:28ae Sunplus Innovation Technology Inc.
Bus 003 Device 002: ID 8087:8001 Intel Corp.
Bus 003 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 002 Device 001: ID 1d6b:0003 Linux Foundation 3.0 root hub
Bus 001 Device 005: ID 413c:81b1 Dell Computer Corp.
Bus 001 Device 003: ID 0a5c:5804 Broadcom Corp.
Bus 001 Device 013: ID 046d:c05a Logitech, Inc. M90/M100 Optical Mouse
Bus 001 Device 012: ID 046d:c31c Logitech, Inc. Keyboard K120 for Business
Bus 001 Device 011: ID 03f0:5c17 Hewlett-Packard LaserJet P2055 series
Bus 001 Device 010: ID 2109:2812
Bus 001 Device 009: ID 2109:2812
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub

I would appreciate your help.
Thanks!



I attach the log file from /var/log/displaylink/