Power management mode settings

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Power management mode settings [Copy link]

The difference between green pc and traditional computers is that green pc has power management function. With this function, when the computer is turned on but not in use, the power consumption will be reduced to save energy. When the computer is operating normally, it is in normal mode. In this mode, the power management program will control the access to the image, parallel port, serial port and disk drive, as well as the operation status of the keyboard, mouse and other devices. These are called power management events. When none of these events occur, the system enters power saving mode. When any of the controlled events occurs, the system immediately returns to normal mode and operates at maximum speed. The power saving mode can be divided into three modes according to the degree of power consumption: doze mode, standby mode and suspend mode. The order in which these four modes occur is as follows:



The system's power consumption is as follows:

normal > doze > standby > suspend

1. In the main menu, select "power management setup" and press enter to enter. The following screen will appear:



2. You can use the arrow keys to move between the items you want to change, and use the pgup, pgdn, + or - keys to change the value.

3. When you have completed the power management settings, press esc to return to the main menu.

Next, we will briefly describe the options in this menu:



These options allow you to select the type of power saving (or power saving level), and will also directly affect the following modes:

1. Hard drive power off

2. Doze mode

3. Suspend mode

There are three power management options to choose from, two of which have fixed settings:

User defined

"User defined" allows you to define the waiting time before entering the power mode.







If the system does not access the data in the hard drive within the specified time, the hard drive engine will stop running to save power usage. You can select a value between 1 and 15 minutes or choose to turn it off according to your hard drive usage.

Doze mode:



When you select "User defined" in "Power Management", you can select a value between 1 minute and 1 hour for this mode. If no power management event occurs during this set time, that is, the computer does not perform any activities during this time, the system will enter the suspend power saving mode. If you turn off this mode, the system will directly enter the next mode (break mode).

Suspend mode:



When you select "User defined" in "Power Management", you can select a value between 1 minute and 1 hour for this mode. If no power management event occurs during this set time, that is, the computer does not perform any activities during this time, the system will enter the break power saving mode. The CPU will stop working completely.

If you turn off this mode, the system will not enter the break mode.

Minimum power saving

If you enable these three power saving modes, the system will be set to the minimum power saving mode.

Hard disk power off = 15 minutes

Suspend mode = 1 hour

Break mode = 1 hour

Maximum power saving

If you enable these three power saving modes, the system will be set to the maximum power saving mode.

Hard disk power off = 1 minute

Pause mode = 1 minute

Interrupt mode = 1 minute

ACPI sleep type (ACPI Suspend TVPE)

There are two options for this item: S1 (POS) or S3 (STR). The system default value is S1 (POS). Usually ACPI defines six states of system sleep types, which are: system S0 state, S1, S2, S3, S4, S5. Below we will explain what the system does in the S1 and S3 states.

S1 (POS) state (POS is the abbreviation of power on suspend): When the system is in the S1 sleep state, its behavior will be as follows:

The processor will not execute instructions, but will still keep the action program before the sleep so that it can continue to execute when it resumes.

The content of the dynamic memory is still retained.

The power resource state is in a state compatible with the system S1 state. All power resources provided to the system level refer to the S0 state and are in the off state.

The state of the device is compatible with the current power resource state. Only devices that fully reference the power resource in the on state can be given a state below the current state of the device. In all other cases, the device is in the d3 (off) state.

The device can wake up the system and can do so from the state they are in. The device can initiate hardware events to transition the system state to s0. This transition causes the processor to continue executing instructions from where it stopped.

During the transition to s1, the operating software does not have to clear the processor cache.

s3 (str) state (str is the abbreviation for suspend to ram):

logically, the s3 state is lower than the s2 state, and it is assumed to save more power consumption. The behavior in this state is defined as follows:

the processor will not execute any instructions, and the actions performed during sleep are not retained.

The contents of dynamic memory are still retained .

The power resource state is in a state compatible with the system s3 state. All power resources provided to the system level are referenced to s0, s1 or s2 and are in the off state.

The state of the device is compatible with the current state of the power resource. Only devices that fully reference the power resource in the On state can be given a state under the device's current state. In all other cases, the device is in the D3 (off) state.

The device can wake up the system, and can do so from the state they are in. The device can begin hardware events to transition the system state to S0. This transition causes the processor to begin executing instructions from its boot position. The BIOS will complete the core functional initialization actions required to leave the S3 state, and the operating software does not need to clear the processor cache during the transition to S1. Control is transferred to the firmware to continue execution. Please refer to the ACPI specification Rev. 1.0 Section 9.3.2 for a description of BIOS initialization.

From the software point of view, this state is very similar to the S2 state in terms of functionality. The difference in operation is that some power resources can remain on in the S2 state, but not in the S3 state. Because of this, S3 requires additional devices to be logically below D0, D1, D2, or D3 compared to S2. Likewise, some device wakeup events may work fine in S2 but not in S3.

This is because in the S3 state, the processor's operating program will not be retained. When switching to the S3 state, the software must be used to clear all cache data in the DRAM.

* The above information about S0 and S3 is based on the content of the ACPI specification rev.1.0.

ACPI function (Advanced Configuration and Power Interface Function)

ACPI allows the operating system to have the ability to directly control the computer above the power management and plug and play functions. ACPI requires the operating system to have the control ability to support ACPI.

This option provides you with two options: enabled and disabled. If you want the ACPI function to work properly, all the devices and add-on cards connected to your system must fully support the ACPI function in their hardware and drivers. Otherwise, it will affect the normal operation of the system. As for the operating system, it is currently known that only Microsoft's Windows 98 operating system supports this function. Once again, you must use the Windows 98 operating system, and all of your system's devices and add-on card hardware and their drivers must support ACPI in order for this to work properly. And the device drivers that come with Windows 98 may not necessarily support ACPI. Please ask the vendors of your devices and add-on cards whether their software and hardware support ACPI. For more information about ACPI specifications, please visit the following website: http://www.teleport.com/~acpi/acpihtml/home.htm

ACPI's functions include:

Plug and Play (PNP, including bus and device details) and APM functions that exist in the general BIOS.

Power management control for individual devices, add-on cards (some add-on cards also require special drivers that support ACPI functions to work.) Video display cards, and hard drive devices, etc.

It has a software power-off function and allows the operating system to shut down the computer.

Support multiple event wakeup function (see Table 3-6-1)

Support front panel power and sleep mode switch, see Table 3-6-2 for description, it describes the system status by how long the power switch is pressed. This also depends on how the system with ACPI function is configured.

ATTENTION: If you enable ACPI function in BIOS, the SMI function will be invalid.

System status and power status

In ACPI function, the operating system directly controls the power state transition of all systems and devices. The operating system allows devices to enter or leave low power consumption state based on user preferences and user knowledge of how the device is used by application software. The operating system will enter a low power consumption state according to the data set by the application and the user.

Table 3-61 will explain which device or specified event can wake up the computer from a specified state. And Table 3-6-2 will explain the effect of the length of time the power switch is pressed on the system status.



PM control by APM (power management is controlled by advanced power management):

power management is completely controlled by APM.

There are two options: yes or no. The default is yes. APM stands for Advanced Power Management. APM: The abbreviation of Advanced Power Management, a power management specification jointly established by major manufacturers such as Microsoft and Intel . Video Off After (Under what state will the video be turned off): Select the power saving mode in which the video will be turned off: Always On (Never turn off) The video will not be turned off, this is the "non-power saving" mode. Suspend → Off (Sleep mode → Turn off) The video will only be turned off in the sleep mode. (Default) All Modes → Off (All modes → Turn off) The video will be turned off in all power saving modes. Video Off Method (Video Off Method): There are three video off methods: "blank screen", "v/h sync + blank" and "dpms support". The default is "v/h sync + blank". If this setting cannot turn off the screen, select "blank screen" instead. If your monitor and video card support the dpms standard, please select "dpms support". modem use irq: There are eight items: 3→4→5→7→9→10→11→na(none)→back to 3. The default is na. You can specify the irq used by the modem. soft-offby pwrbtn: There are two items: instant-off or delay4 sec. The default is instant-off. When the system is in operation and the user presses the power switch for more than 4 seconds, it will be enabled, and the system will enter the soft-off state (shutdown by software). This is called power switch reset. state after power failure: There are three items: auto→on→off. The default is off. If your computer loses power or an abnormal power failure occurs, the computer will return to its previous state, the power on state, or the power off state. When one of the specified events occurs, the countdown to enter power saving mode will be reset to zero. Because the computer will enter power saving mode only after a specified inactivity delay (specified time for doze, standby, and suspend modes) and after no activity during this period, any event will cause the computer to recalculate the elapsed time. A resume event is an action or signal that causes the computer to continue calculating time. VGA (VGA port): There are two items: on or off. The default is off. When set to on, any event that occurs on the VGA port will wake up the system that has been powered down. LPT & COM (parallel port and serial port): There are four items: LPT/COM → None → LPT → COM. The default is LPT/COM. When set to LPT/COM, any event that occurs on the LPT (printer)/COM (serial) port will wake up the system that has been powered down.













































HDD & FDD (Hard Disk Drive & Floppy Drive):

There are two items: on or off. The default is on. When set to on, any event occurring on the hard disk or floppy port will wake up the system from power down.

PCI Master (PCI Master Signal):

There are two items: on or off. The default is off. When set to on, any event occurring on the PCI Master will wake up the system from power down. PowerOn

by PCI Card (PCI Card Power On):

There are two items: disabled or enabled. The default is disabled. Depending on the design of your PCI adapter, the system can be woken up by the PCI adapter. If you need this function, set it to enabled.

Wake Up on LAN/Ring (Wake Up on LAN/Ring):

There are two items: disabled or enabled. The default is disabled. When set to enabled, any event causing LAN activity/modem ringing will wake up the system from power down.

RTC Alarm Resume:

There are two items: disabled or enabled. The default is disabled. When set to enabled, you can set the date and time when the RTC (Real Timer) alarm will wake up the system from sleep mode.

Date (of month)/timer (hh:mm:ss):

You can set the date and time of the month when any event that occurs will wake up the system from power saving mode.



Primary Intr:

There are two items: on or off. The default is on. When set to on, any of the following events will wake up the system from power saving mode.

The following is a list of IRQs (interrupt requests) that can be turned on or off like the COM port and LPT port mentioned above. When an I/O device wants to get the attention of the operating system, it sends out an IRQ to notify. When the operating system is ready to

respond to this request, it interrupts itself and executes the service.

As mentioned above, the options can be on and off.

When set to on, the action will not prevent the system from entering power management mode, nor will it wake it up. Each item has three options: primary → secondary → disabled.

irq3 (com 2): com2, the default is primary.

irq4 (com 1): com1, the default is primary.

irq5 (lpt 2): lpt2, the default is primary.

irq6 (floppy disk): floppy disk drive, the default is primary.

irq7 (lpt1): lpt1, the default is primary.

irq8 (rtc alarm): real-time timer, the default is disabled.

irq9 (irq2 redir): irq2 boot, the default is secondary.

irq10 (reserved): reserved, the default is secondary.

irq11 (reserved): reserved, the default is secondary.

irq12 (ps/2 mouse): ps/2 mouse, the default is primary.

irq13 (coprocessor): coprocessor, the default is primary.

irq14 (hard disk): hard disk, default is primary.

irq15 (reserved): reserved, default is disabled.