Check when nvidia-smi on Ubuntu doesn't work

I installed nvidia-driver, but nvidia-smi didn't work and I suffered a lot, so I'll write it down here as a memo for myself.

Disable Secure boot

I don't know why, but nvidia-smi may throw an error when Secure boot is enabled. Let's disable it from the BIOS.

How to install driver

ubuntu-drivers devices

Select the one that seems to be just right from the candidates that came out in

sudo apt install nvidia-driver-440

Install as follows.

For some reason, the .run file on nvidia's official website didn't work.

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