嘿， 问一下， 现在台式机在 sleep 或 hinernation 时，电源上的电扇转么？
Sleep是S3了，Hibernate都是S4了，电扇为什么要转呢？如果转，BIOS控制Fans那部分的ACPI没有弄好，或者硬件设计问题，或者你买的机器问题。
我说的是CPU或者GPU上的电扇。电源电扇应该也停下来才对。
The ACPI specification defines the following seven states (so-called global states) for an ACPI-compliant computer-system:
G0 (S0): Working
G1, Sleeping subdivides into the four states S1 through S4:
S1: All processor caches are flushed, and the CPU(s) stop executing instructions. Power to the CPU(s) and RAM is maintained; devices that do not indicate they must remain on may be powered down.
S2: CPU powered off
S3: Commonly referred to as Standby, Sleep, or Suspend to RAM. RAM remains powered
S4: Hibernation or Suspend to Disk. All content of main memory is saved to non-volatile memory such as a hard drive, and is powered down.
G2 (S5), Soft Off: G2 is almost the same as G3 Mechanical Off, but some components remain powered so the computer can "wake" from input from the keyboard, clock, modem, LAN, or USB device.
G3, Mechanical Off: The computer's power consumption approaches close to zero, to the point that the power cord can be removed and the system is safe for dis-assembly (typically, only the real-time clock is running off its own small battery).
