Solution to automatically restart Ubuntu after it is shut down

I installed the Ubuntu 14lts development edition before, But I updated the kernel while I was idle. Later, I encountered the problem that Ubuntu will automatically restart after being shut down for 5 seconds. A friend of mine who uses kilin also encountered this problem. I have repeatedly discovered that if your computer is inserted with a USB flash drive, shutdown is normal, but this method is not very friendly. After that, you can see the best solution in the post bar, as long as the network is connected, enter the following command in terminal to solve the problem.

Sudo apt-Get install laptop-mode-Tools