开机报错如下：
[1.304422] sd 0:0:0:0: [sda] Assuming drive cache:write through [2.770269] piix4_smbus 0000:00:07.3: Host SMBus controller not enabled! [3.041253] intel_rapl: no valid rapl domains found in package 0 Welcome to emergency mode! After logging in,type "journalctl -xb" to view system logs,"systemctl reboot" to reboot,"systemctl default" or ^D to try again to boot into default mode. Give root password for maintenance (or type Control-D to continue):
后来运行journalctl -xb查看报错信息，运用网上解决方法并不行，最后查看察觉会不会是内核版本问题，之后进行内核升级，发现问题解决！
原文：https://www.cnblogs.com/frank-hui/p/12983349.html