1: Uninstall the graphics card driver
(1) Ctrl + Alt + F1 to enter the terminal character interface
(2) sudo service lightdm stop
(3) sudo apt-get remove --purge nvidia- *
(4) sudo apt-get autoremove ## if it is The graphics card driver installed in the .run file does not need to perform steps (3) and (4), directly execute step (5), or not used.
(5) sudo ./NVIDIA-Linux-x86_64-xxx.run --uninstall
(6) Input: reboot to restart the computer
