Error:
NVIDIA-SMI has failed because it couldn't communicate with the NVIDIA driver.
Make sure that the latest NVIDIA driver is installed and running.
Situation:
Cuda: did install NVCC-V: messages appear
Solution:
1) query the current NVIDIA driver version number
ls /usr/src | grep nvidia
#if output: nvidia-450.57
2) Install relevant tools
sudo apt install dkms
3) Reinstall the driver
sudo dkms install -m nvidia -v 450.57
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