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Resolving Problems with Sleep and Hibernate Modes (Windows Vista)

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This document pertains to HP Notebook computers with Windows Vista.
When you want to save battery power on your computer, you can choose to put your computer into either Sleep or Hibernate mode.
  • Sleep saves the state of all open programs to memory, then powers down both the display panel and hard disk drive. Only enough power is used to maintain the data in the memory. Restoring from Sleep mode happens quickly, in most cases in a matter of seconds. Sleep mode is useful when you need to pause the computer for a short time. However, maintaining the power to the memory modules can drain a battery if the computer is not plugged in.
  • Hibernate saves the state of all open programs to the hard disk, then completely powers off the computer. This allows the computer to consume no power whatsoever. When you restart the computer, the previous state of all open programs is restored. Restarting from Hibernate mode usually takes longer than restarting from Sleep mode. Use this state when you do not need your computer for an extended period of time.
NOTE:Not all HP computers support Hibernate mode. The availability of the Hibernate feature depends on the BIOS firmware and the graphics adapter your particular computer uses. For more information on using Hibernate mode with Windows, see the Microsoft web page Sleep and hibernation: frequently asked questions . For information on keeping your computer up-to-date, see Locate and Install Updated BIOS, Drivers, and Software .

Using Sleep and Hibernate modes

There are a number of way to put the computer into Sleep or Hibernate modes. You can also customize how your computer enters each mode, or set up the computer so that it uses one mode exclusively. The following sections show you how to use the Sleep and Hibernate modes.
Generally, you can put a computer into either Sleep or Hibernate mode by pressing a button or closing the display panel lid. The default configuration for many HP notebook computers is as follows:
  • Press the Sleep button on the keyboard to put the computer into Sleep mode.
  • Press the Power button on the keyboard to put the computer into Sleep mode.
  • Close the display panel lid to put the computer into Sleep mode.
These settings can be adjusted, however, to suit your needs. For details, see Configure the computer buttons and lid behavior section, below.
(For information on locating the Sleep and Power buttons on your particular HP computer, consult the documentation that came with it.)
The alternative to using the hardware to put the computer into Sleep or Hibernate mode is to use the Shut down menu in Windows:
  1. Click Start , then click the triangle on the Shut down button to display the Shut down menu.
  2. Select either the Sleep or Hibernate option.
    Figure 1: Shut down menu
    Shut down menu
    The computer enters the selected mode.
To wake the computer from either Sleep or Hibernate mode:
  • Press any button on the internal touchpad, or make a gesture across the touchpad surface.
  • Press any button on the internal keyboard.
  • Press the Power button.
External keyboards and mice connected by USB to the computer are set by default to wake the computer from Sleep or Hibernate when a button on either one is pressed. To change the default behavior of these devices, see the next section.

Configure the Sleep and Hibernate modes

There are a number of different ways to configure how the Sleep and Hibernate modes are implemented in the computer.
In Windows, the Power Options control panel allows you to determine:
  • What happens when you press the Sleep button on the keyboard.
  • What happens when you press the Power button on the keyboard.
  • What happens when you close the display panel lid.
To configure the computer buttons and display panel lid behavior:
  1. Click Start , enter power options in the search field, then select the Power Options control panel program from the search results list.
  2. In the Power Options window, select Choose what the power buttons do from the task bar on the left.
    Figure 2: Power options
    Power options
  3. In the System Settings window, configure the desired behavior of the Power button, the Sleep button, and display panel lid.
    Figure 3: System settings
    System settings
  4. Click Save changes to save the configuration settings and close the window.
    The hardware buttons and display panel lid are now assigned the new settings.
The internal keyboard on an HP computer can always wake the computer from Sleep or Hibernate. There is no option to toggle between enabled and disabled. However, an external keyboard connected to the computer by USB can be enabled to wake the computer, or the option can be disabled.
To configure an external keyboard:
  1. Click Start , enter keyboard in the search field, then select Keyboard from the search results list.
  2. In the Keyboard Properties window, click the Hardware tab, select an external keyboard to configure, and then click Properties .
    Figure 4: Keyboard properties
    Keyboard properties
  3. Click the Power Management tab, then select Allow this device to wake the computer . To prevent the keyboard from waking the computer, deselect this option instead.
    Figure 5: Power management
    Power management tab
  4. Click OK to save your changes and close the window, then click OK again to close the Keyboard Properties control panel.
    NOTE:If you are not sure if your external keyboard supports Sleep or Hibernate mode, click the Details tab in the keyboard properties window, and select Power data from the Property menu. View the Power capabilities section to see the exact function calls supported by the keyboard. If the keyboard cannot support a WAKE function, a connection problem exists or the device is incompatible.
    Figure 6: Details tab
    Details tab
The internal touchpad on an HP computer can always wake it from Sleep or Hibernate. There is no option to toggle between enabled and disabled. However, an external mouse connected to the computer by USB can be enabled to wake the computer, or the option can be disabled.
To configure an external mouse:
  1. Click Start , enter mouse in the search field, then select Mouse from the search results list.
  2. In the Mouse Properties window, click the Hardware tab, select an external mouse to configure, and then click Properties .
    Figure 7: Hardware tab
    Hardware tab
  3. Click the Power Management tab, then select Allow this device to wake the computer . To prevent the mouse from waking the computer, deselect this option instead.
    Figure 8: Power management tab
    Power management tab
  4. Click OK to save your changes and close the window, then click OK again to close the Mouse Properties control panel.
    NOTE:If you are not sure if your external mouse supports Sleep or Hibernate mode, click the Details tab in the mouse properties window, and select Power data from the Property menu. View the Power capabilities section to see the exact function calls supported by the mouse. If the mouse cannot support a WAKE function, a connection problem exists or the device is incompatible.
    Figure 9: Details tab with Power data
    Details tab with Power data
On many HP computers, the network adapter used for wired network connections is configured to wake the computer from Sleep or Hibernate when it receives special data packets from the network known as "magic packets." This feature is called Wake-on-LAN and is typically used for the remote management of computers.
NOTE:A wireless network adapter does not support the Wake-on-LAN feature, and so cannot be configured to enable or disable it.
To configure the wired network adapter:
  1. Click Start , enter device in the search field, then select Device Manager from the search results list.
  2. In the Device Manager window, expand the Network Adapters item by clicking the plus (+ ) beside it. Right-click the network adapter used for wired network connections, then select Properties from the pop-up menu.
    Like computers, network adapter names vary widely depending on model and manufacturer. There is no single, consistent name for them. To find out the name of the wired network adapter in your particular computer, consult the product specifications that came with it.
    Figure 10: Device manager
    Device manager with network adapters expanded
  3. In the network adapter Properties window, select the Power Management tab, then select the Allow this device to wake the computer option. Select the Only allow management stations to wake the computer option if your computer is going to be remote managed.
    To prevent network activity from waking the computer, deselect this option instead.
    Figure 11: Power management
    Power management Allow this device... and Only allow management stations... checked
  4. Click OK to save the changes and close the network adapter Properties window, then close the Device Manager window.
    NOTE:If you are not sure if your wired network adapter supports Sleep or Hibernate mode, click the Details tab in the network adapter properties window, and select Power data from the Property menu. View the Power capabilities section to see the exact function calls supported by the network adapter. If the network adapter cannot support a WAKE function, a connection problem exists or the device is incompatible.
    Figure 12: Details tab
    Detail tab with Power data capabilities
You can set up a Power Plan for when the computer should go into Sleep or Hibernate mode. A Power Plan can help you save energy while maximizing your system performance. To learn more about Power Plans, see Power Management (Windows Vista) .

Troubleshoot problems with Sleep and Hibernate mode

If your computer does not wake, or it wakes unexpectedly, from Sleep or Hibernate, then try the following troubleshooting guidelines to resolve the issue.
Some external devices such as SD cards, USB devices, or other peripherals can prevent the computer from going in and out of Sleep or Hibernate mode. To see if one of them is causing a problem, disconnect it from the computer and then put the computer into Sleep or Hibernate. If you have multiple external devices or peripherals, disconnect them one by one and put the computer into Sleep or Hibernate mode each time. If one of the external devices is the source of the problem, then the problem should go away once you disconnect the device from the computer.
If the problem persists even after disconnecting all external devices, see the next section.
If you have an external keyboard or external mouse attached to the computer, check the settings for each to see if the Allow this device to wake the computer option is enabled or disabled. Toggling this option may correct the Sleep or Hibernate problem.
For details on toggling the wake option for an external keyboard or external mouse, see the Configure the Sleep and Hibernate modes section, above.
Some third-party screen savers can interfere with Sleep or Hibernate mode. Disabling or changing the screen saver may resolve the problem.
  1. Click Start , and then click Control Panel .
  2. Click Personalization , then click Screen Saver .
    Figure 13: Personalization screen
    Personalization screen with Screen Saver selected
  3. In the Screen Saver Settings window, select an alternate screen saver or set it to (None) , and then click OK .
    Figure 14: Screen saver settings
    Screen saver settings
Put the computer into Sleep or Hibernate mode; if the problem still exists, go to the next section.
Many software components start up automatically and run without being seen. Most of these programs are not necessary to the work performed on a computer, but can interfere with Sleep or Hibernate mode.
For troubleshooting purposes, use the following steps to prevent programs from starting when Windows start, and then test the Sleep and Hibernate functions.
  1. Click Start , type msconfig in the search field, then select msconfig.exe from the search results list. If you are prompted for an Administrator password or confirmation, type the password or provide confirmation.
  2. In the System Configuration window on the General tab, check the Selective startup option.
    Figure 15: System configuration
    System configuration with Selective startup selected
  3. Next, click the Startup tab and uncheck any startup items that you do not think need to be run immediately upon loading Windows.
    Figure 16: Startup tab
    Startup tab
    If you are unsure about what a startup item does, write the name down and research it on the Internet. Do not uncheck something if you do not know what it does.
  4. Click OK to save the changes.
  5. When prompted, click Restart .
  6. If Windows or other software stops working after an item related to it has been unchecked, restart the computer and reverse these changes. If needed, you can press F8 as the computer restarts and before Window loads to enter Safe Mode.
If Sleep or Hibernate mode previously worked but now is causing problems or does not work, use System Restore to revert the computer back to a time when those modes worked. If the problem has always existed, skip this section.
To perform a System Restore:
  1. Save any open files and close all programs. Backup any important files.
  2. Click Start , enter restore in the search field, then select System Restore from the search result list.
  3. Select Choose a different restore point, and then click Next .
  4. Select a date from the list when Sleep or Hibernate mode worked correctly, and then click Next .
  5. Confirm the restore point, and then click Finish .
  6. Click Yes in the confirmation message that opens.
  7. The computer should shut down and turn back on automatically after the restoration completes.
  8. After the computer restarts, put it into Sleep or Hibernate mode to see if the problem still exists.
    • If after performing a System Restore the computer can enter Sleep or Hibernate mode, the problem is probably caused by software that was installed after the restore point date. Install the latest drivers and software one at a time and test the Sleep and Hibernate functions.
    • If the problem still exists, see the next section.
The BIOS controls every physical component in a computer at a hardware level, outside the scope of the operating system. If you have tried all of the above troubleshooting solutions, then you may need to update the computer's BIOS. Go to the HP Software and Driver Download page , enter your computer model number into the field provided, and install any keyboard and BIOS updates available for Windows.
If, after updating the BIOS and device drivers, the problem still exists, contact HP support.