Same here
After updating to Ubuntu Gnome 17.04 from Ubuntu 16.04, I experience the same issue as described above:
The DisplayLink installer works fine, and a monitor connected through my DisplayLink Docking Station is recognized and can be activated. However, the image on the monitor is not refreshed. It generally stays black, or shows a frozen image. The mouse cursors is the only thing that is visible and active on the monitor.
To check whether this issue might be due to Gnome Shell, I also tried it with Xfce4, which uses simple non-hardware accelerated graphics. But the problem is the same with Xfce4.
On Ubuntu 16.04, things worked like a charm (except for excessive CPU use).
I attached the output of the Linux Support Tool.
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