I understand you are facing an issue with loading the NVIDIA Accelerated Graphics Driver for Linux on a system with Secure Boot enabled. This error message indicates that the kernel module failed to load because it was not signed by a key that is trusted by the system.
To resolve this issue, you can try the following steps:
- Disable Secure Boot on your system. This will allow the kernel module to load even if it is not signed by a trusted key. You can usually disable Secure Boot from the BIOS or UEFI settings of your system.
- If you cannot/do not want to disable Secure Boot, you can try signing the kernel module with a key that is trusted by your system. NVIDIA provides instructions on how to sign the kernel module with a trusted key in their documentation. You can find the documentation at the following link: https://docs.nvidia.com/cuda/cuda-installation-guide-linux/index.html#runfile-verifications
There is a proven solution on this open forum that worked for many, I'd recommend you to review this https://askubuntu.com/questions/1023036/how-to-install-nvidia-driver-with-secure-boot-enabled/1049479#1049479
If neither of these solutions work for you, please provide me installation logs for you NVIDIA GPU Driver so that I can assist you better. Also, please confirm if you have used a market place image to deploy your Ubuntu Linux distro?