Updated Drivers from 1.0.335 to 1.2.65
 

Hello,
I have this dock:
Product: Dell USB3.0 Dock (D3100)
Manufacturer: DisplayLink

And I read about the new drivers being available, and I read the change log and was pretty excited, because the issues resolve were ones I have been having for over a year.
I ran the ./displaylink-driver-1.2.65.run, it ran fine. I then rebooted, now the displays dont work.
The monitors are no longer detected or show up in dmesg. Network, sound and usb hub all still work.

I tried downgrading back to 1.0.335, but it didnt help, I am pretty sure the firmware of the dock updated. Attached is my dlsupporttool zip file.

Help,
LinuxDocky

Monitors:
Dell Inc.-DELL 2007FP
Dell Inc.-DELL 2007FP

Laptop: Dell Inc. Precision 5510
OS: Ubuntu 14.04
Kernel: Linux 3.19.0-79-generic #87~14.04.1-Ubuntu SMP Wed Dec 21 18:12:31 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

The issue was Ubuntu has updated how it validates it kernel modules for secure boot.
I needed to disable secure boot, now even the lastest version of the drivers works.

Disable secure boot in your vendor's bios, then disable it in ubuntu.
I stole this part from Nevin on these vary forums:

It seems that the command line used for disabling the secure boot mode was the following:
sudo mokutil --disable-validation
-asked for a password
- restart and during BIOS step ask to type any key for modification
- choose change secure boot state
- enter some characters of the password

-Linuxdocky