https://hceng.cn/2018/01/18/Linux%E7%94%B5%E6%BA%90%E7%AE%A1%E7%90%86/ 1.1系统睡眠模型Suspend On (on) S0 - WorkingStandby (standby) S1 - CPU and RAM are powered but not executedSuspend to RAM (mem) S3 - RAM is powered and the running content is saved to RA