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Troubleshooting Sleep and Hibernate issues (Windows Vista)

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This document pertains to HP computers with Windows Vista.
The Sleep and Hibernate modes are power-saving states that greatly reduce the energy use of your PC while it is in use. The Sleep mode keeps your work and settings in memory, cutting energy use significantly, but allows you to return your PC to normal operation quickly.
Hibernate mode is a power-saving feature designed primarily for notebooks. While Sleep mode temporarily suspends your work and settings, drawing a small amount of power, Hibernate mode saves open documents and programs to the hard disk, and then powers down your PC. As Hibernate mode uses virtually no energy, it is the best option for conserving the battery power of your notebook.
When the Sleep and Hibernate functions are working properly, there are a number of ways, both manual and automatic, to make your PC Sleep or Hibernate. You can also customize how your computer enters each mode, or set up the computer so that it uses one mode exclusively.
Use the procedures in this document to resolve common issues with the Sleep and Hibernate modes.

The computer does not wake from Sleep or Hibernate mode

Restarting your computer erases all information in the computer's memory, which may restore functionality. Before performing the following tasks be sure to restart your computer to attempt to resolve the issue:
If you have a notebook computer that cannot return from Sleep mode, first make sure it is connected to an AC power source and the power light is on.
Sleep or Hibernate issues on notebook computers can be caused by external devices connected to the notebook by USB drives. An external mouse or an external keyboard connected by USB may not be configured to wake a notebook from Sleep or Hibernate modes.
The following sections explain how to check the keyboard and mouse settings, allow an external keyboard or mouse to wake the computer, and Wake-on-LAN:
A notebook not waking from Sleep or Hibernate modes can be the result of devices not being enabled to wake the computer. If you have an external keyboard or external mouse attached to the notebook, 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 Testing and Configuring the Sleep and Hibernate modes section.
An external keyboard connected to the computer by USB or Bluetooth can be enabled to wake the computer, or the option can be disabled.
NOTE:The internal keyboard on an HP notebook can always wake the computer from Sleep or Hibernate. There is no option to toggle between enabling and disabling the waking function of an internal keyboard.
To enable an external keyboard to wake your computer from Sleep or Hibernate:
  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 1: 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 2: 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 3: Details tab
    Details tab
An external mouse connected to the computer by USB or Bluetooth can be enabled to wake the computer, or the option can be disabled.
NOTE:The internal touchpad on an HP notebook PC can always wake it from Sleep or Hibernate. There is no option to toggle between enabling and disabling the waking function of an internal touchpad.
Use the following steps to configure an external mouse to wake your computer from Sleep or Hibernate:
  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 4: 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 5: 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 6: 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 7: 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 8: 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 9: Details tab
    Detail tab with Power data capabilities

The computer wakes from Sleep or Hibernate mode unexpectedly

Interruptions to Sleep or Hibernate modes are often caused by software and external devices. The following sections describe how to check external devices, screen savers, and programs that may be responsible for waking the computer:
Just as devices like an external mouse or keyboard can be enabled to wake a computer from Sleep or Hibernate mode, external devices such as SD cards, USB devices, or other peripherals can prevent the computer from staying in 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.
Some 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 10: 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 11: 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 starts, 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 12: 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 13: 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.

Testing and configuring Sleep and Hibernate modes

There are a number of different ways to configure how the Sleep and Hibernate modes are implemented in the computer. Being aware of how the Sleep and Hibernate modes are configured on your PC can help you avoid later issues.
If your PC has a keyboard with Sleep and Power buttons, you can configure those to make the computer Sleep or Hibernate. A notebook PC can be configured to Sleep when the display panel lid is closed. If you still experience problems with Sleep and Hibernate modes, continue to the next section.
To verify that Sleep and Hibernate can be activated manually, test them from the Shut down menu.
To test whether or not you can enter Sleep or Hibernate mode manually, 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 14: Shut down menu
    Shut down menu
    The computer should enter the selected mode.
If your computer does not wake, or it wakes unexpectedly, from Sleep or Hibernate, then try the following troubleshooting instructions to resolve the issue:
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 (HP notebook computers).
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 15: 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 16: 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.

Using System Restore to resolve problems with Sleep or Hibernate 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, and 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.

Updating the BIOS to resolve problems with Sleep or Hibernate mode

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 BIO
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.
For more information on updating the BIOS for a notebook, see Updating the BIOS . For more information on updating the BIOS for a desktop, see Updating the BIOS .
If, after updating the BIOS and device drivers, the Sleep or Hibernate mode problem still exists, contact HP support for additional assistance and support.

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