Important note: The mokutil tool will prompt you for a password which you need to enter again in a subsequent step. Import the key by using the following command: sudo mokutil -import MOK.der.
Sign the module using the following command: sudo /usr/src/linux-headers-$(uname -r)/scripts/sign-file sha256. Use openssl to create a key pair: openssl req -new -x509 -newkey rsa:2048 -keyout MOK.priv -outform DER -out MOK.der -nodes -days 36500 -subj "/CN=MyPersonalKeyPair/". Locate the module evdi.ko: When using Ubuntu, the module should be located here: ls /lib/modules/$(uname -r)/dkms/evdi.ko Add a the Signature Keys for UEFI Secure Boot.So, you have to perform the following steps to get this module loaded successfully. So, obviously modprobe cannot load the module named evdi.ko because it’s not digitally signed. May 21 19:41:40 systemd: Failed to start DisplayLink Driver Service. May 21 19:41:40 systemd: rvice: Failed with result 'exit-code'. May 21 19:41:40 systemd: rvice: Control process exited, code=exited, status=1/FAILURE May 21 19:41:40 kernel: Lockdown: modprobe: unsigned module loading is restricted see man kernel_lockdown.7 May 21 19:41:40 sh: modprobe: ERROR: could not insert 'evdi': Operation not permitted May 21 19:41:40 systemd: Starting DisplayLink Driver Service.
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May 21 19:41:40 systemd: Stopped DisplayLink Driver Service. You will see something like this in /var/log/syslog: May 21 19:41:40 systemd: rvice: Scheduled restart job, restart counter is at 52. However, if you have SecureBoot enabled, Ubuntu won’t be able to load the driver. Installation of the DisplayLink driver is pretty straightforward. There are already some descriptions, the most helpful was this one:, but it was slightly different to my setup, therefore a similar description here:
#Displaylink usb graphics software for ubuntu install
If you are using the Dell Docking Station D6000, you need to install the DisplayLink driver.
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