I tried to install the Nvidia driver (sudo apt-get install nvidia-390) for AI calculations on GPU in Ubuntu 16.04 and 18.04. The installation works, but afterwards python3 is not working and giving the error: "ModuleNotFoundError: No module named 'tkinter'", but of course tkinter is installed and can not be reinstalled. I have a notebook with GT 740M graphics card. Any ideas how to get the graphics card running and also python3 running?
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