U3DUALADA not detected in Ubuntu 16.04.2

[petr.krizek]

U3DUALADA not detected in Ubuntu 16.04.2
after re-installing NVIDIA drivers.
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The NVIDIA had to be reinstalled
because my "fixed" (non-displayLink) monitors flickered in an infinite loop after boot.

NVIDIA was reinstalled like this:
http://askubuntu.com/questions/76093...vidia-graphics
sudo apt-get purge nvidia-*
sudo add-apt-repository ppa:graphics-drivers/ppa
sudo apt-get update.
sudo apt-get install nvidia-375

After this monitors stopped flickering but Displaylink DVI outputs disappeared from xrandr and GUI "detect displays".

Uninstalling and reinstalling DisplayLink drivers didn't help.
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Attached your log file.