使用boot-repair修复
sudo add-apt-repository ppa:yannubuntu/boot-repair
sudo apt update
sudo apt install boot-repair
boot-repair
删除无效启动项
sudo vi /boot/grub/grub.cfg
sudo update-grub
sudo add-apt-repository ppa:yannubuntu/boot-repair
sudo apt update
sudo apt install boot-repair
boot-repair
sudo vi /boot/grub/grub.cfg
sudo update-grub