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Not working on ubuntu 16.04

After I upgraded to 16.04 LTS, I could not use my DisplayLinks graphics/ethernet adapter for graphics (ethernet works fine). I recently installed the newest driver (1.2.65) but I get this error:

Warning: dlm.service changed on disk. Run 'systemctl daemon-reload' to reload units.
Job for dlm.service failed because the control process exited with error code. See "systemctl status dlm.service" and "journalctl -xe" for details.

I run journalctl as suggested by the error message and here is what I get:

26 16:27:28 myhost systemd[1]: Starting DisplayLink Manager Service...
-- Subject: Unit dlm.service has begun start-up
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit dlm.service has begun starting up.
26 16:27:28 myhost modprobe[12034]: modprobe: ERROR: could not insert 'evdi': Required key not available
26 16:27:28 myhost systemd[1]: dlm.service: Control process exited, code=exited status=1
26 16:27:28 myhost systemd[1]: Failed to start DisplayLink Manager Service.
-- Subject: Unit dlm.service has failed
-- Defined-By: systemd
-- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel
--
-- Unit dlm.service has failed.
--
-- The result is failed.
26 16:27:28 myhost systemd[1]: dlm.service: Unit entered failed state.
26 16:27:28 myhost systemd[1]: dlm.service: Failed with result 'exit-code'.

Any ideas?

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    Stavros Sachtouris shared this idea  ·   ·  Flag idea as inappropriate…  ·  Admin →

    4 comments

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      • Lord Booth commented  ·   ·  Flag as inappropriate

        >> modprobe[12034]: modprobe: ERROR: could not insert 'evdi': Required key not available

        Nearly the same error message as above, but substantially the same. I do not believe this is an error from DisplayLink. In my case, it was because of my default BIOS security settings.

        My UEFI Bios Secure boot setting was active. I believe it was preventing all third party drivers, DisplayLink included, from installing.

        From here: https://askubuntu.com/questions/762254/why-do-i-get-required-key-not-available-when-install-3rd-party-kernel-modules (The post by Pilot6)

        It shows two ways to disable it. For my Ubuntu 16.04 LTS, I used:

        sudo apt install mokutil
        sudo mokutil --disable-validation
        ..

        It will ask you to set up a password of at least 8 chars. Write it down. When you reboot it will ask for random chars within that password string.. char 2, char 7, etc. You will then be able to disable secure boot.

        Everything came up fine after this.

      • Riccardo commented  ·   ·  Flag as inappropriate

        Disconnect the usb port to the dock station and rerun the driver installation. That worked for me.

      • Anonymous commented  ·   ·  Flag as inappropriate

        Umm, ok, this was last October, and it's now almost February. Buehler? ... Anyone? ...

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