Learn more about notebook power management mode

Author: John

Author: John

1, Concept of ACPI ACPI: Advanced Configuration and Power Interface There are several modes of ACPI: S0 to normal.

S1 CPU to stop working.

S2 CPU shut down.

In addition to memory outside the S3 components are to stop working.

S4 memory write information to disk, all the parts stop working.

S5 closed. ACPI power management mode to use hardware and software requirements can be fully supports the ACPI function. If you encounter problems in use, you can try to upgrade the latest Acpi.sys file. In addition, the hardware of the ACPI support is essential. Chassis power supply 5 volts to the motherboard at the same time, we must make current stabilized at more than 720 milliamperes to be able to make a computer in a short time from the sleep state wakes up. The program can be achieved by selecting the power supply power management, power management program is the computer power on the use of a group of settings. Windows2000 provides the following three kinds of preset power management program (always open, portable / laptop, home / office desktop), the user can also set up their own computer into standby mode or turn off the hard drive and monitor the waiting time required. 2, ACPI and APM Comparison APM 1.0 & 1.1: the implementation by the BIOS Power Management; APM 1.2: operating system, the definition of power management time from the BIOS is responsible for implementation; ACPI: BIOS collection of hardware information, define power management solutions; by the operating system responsible for the implementation. APM is a software solution, therefore, with the operating system-related, but ACPI is an industry standard, including software and hardware specifications. 1) How to determine the system is in S1 or S3 mode? A: The S1 sleep mode, ACPI, only the CPU to stop working, other equipment are still in power-up state. The S3 in the ACPI mode (BIOS-> Power Management -> Suspend to RAM set to Enable, among other equipment are situated outside the memory power-down state. Therefore, to determine the system is in S1 or S3 mode mode The easiest way is to carefully observation system situation: In the S3 state, all the equipment to stop working, even if the pop-up button on the drive can not open the drive door. In the S1 state, optical drive door is open. In addition, S3 mode, the system is completely quiet , all the fans are stopped. At this point system can not wake up from the keyboard. manual method can only be awakened by the power button on the front panel. 2) To achieve STR, so why not cut off the power after shutdown? Answer: STR function is turned off, it will be the operation of the system information stored in memory, the next boot directly read the memory information, and return to pre-shutdown state. Its advantage is to start very fast, and can keep working condition. The disadvantage is that, even after shutdown, we can not disconnect the computer power supply. Because the data in memory will be lost once the power cut off. 3) In the closing Win2000, display now safe to shut down instead of automatically close ATX power supply, how should I do? Answer: can try the following approach: choose Settings / Control Panel / Power Options / Advanced Power Management, if the machine supports advanced power management, then select the Enable Advanced Power Management Support and then in the HKEY_LOCAL_MACHINESOFTWAREMicrosoftWindowsNTCurrentVersionWinlogon Mid PowerdownAfterShutdown for 1; if the machine does not support advanced power management, then, unfortunately, only in the closed system, the display now safe to shut down? had to manually cut off power supply. 4) does not care to Close Windows dialog box Let the computer to sleep to the lost, and ask how to restore? A: Generally speaking, such problems as long as the reinstall motherboard drivers, restart the future should be able to solve the problem, you can also Control Panel / System / Device Manager in the Advanced Power Management support deleted, and then Reboot the machine, according to Windows2000 system can also be prompted to re-install solve the problem. Related: Dell inspiron 1525 Battery, Sony VGP-BPS8 battery, Sony bpl9 battery About the Author:

My blog: http://www.hunt360.org

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