Cannot install CUDA on Ubuntu 18.04 arm64 because of invalid GPG key

Following the instructions in Updating the CUDA Linux GPG Repository Key | NVIDIA Technical Blog to update the CUDA GPG key on a Xavier running Jetpack 4.6. It seems like the GPG key for 18.04 (arm64) hasn’t been updated. I see that the x86_64 key has been updated for 18.04 though.


Could you share how you install or upgrade the CUDA toolkit and the corresponding error (if any)?

In general, we can install CUDA as below:

$ sudo apt update
$ sudo apt install cuda-toolkit-10-2


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