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Troubleshooting sleep and hibernate issues (Windows 7)

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This document pertains to HP and Compaq computers with Windows 7.

The computer will not wake up from sleep or hibernate mode

Restarting your computer erases all information in the computer's memory, which may restore functionality. Before performing these steps 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.
Skip this step if the computer does not enter sleep mode or if the computer wakes unexpectedly.
Follow these steps to enable your keyboard to wake your computer from sleep mode:
  1. Click Start , and then type Device Manager into the search field. Select Device Manager from the results list.
    Figure 1: Search results for Device Manager
    Control Panel with Device Manager selected
  2. Click the arrow next to Keyboards, and then double-click the name of the keyboard.
    Figure 2: Keyboards in Device Manager
    Keyboards selection in Device Manager window
    The Keyboard Properties window opens.
  3. If the Power Management tab is available, proceed to the next step.
    If the Power Management tab is not available, click the Change Settings button if it displays below the Device status box. The same Keyboard Properties window opens with the Power Management tab available.
    If you are prompted for an Administrator password or confirmation, type the password or provide confirmation.
  4. Click the Power Management tab and make sure that the box next to Allow this device to wake the computer is checked.
    Figure 3: Allow this device to wake the computer
    Allow the keyboard to wake the computer in the power management tab
  5. Click OK. Test to make sure that the keyboard can now wake the computer.
    Continue using these steps if the computer still cannot wake from sleep mode.
Some drivers can be downloaded from HP and others can be downloaded from Microsoft using Windows Update. Having the most current BIOS version and drivers installed on your computer can resolve several issues. To find the BIOS and driver updates available for your computer, check, in the following order, the following locations:
  • For instructions to update the BIOS of your computer, see the HP support document, Updating the BIOS .
  • For information and instructions on downloading and updating software and drivers, see the HP support document, Downloading or updating software and drivers for HP computers .
  • For information about using Windows Update for your computer in Windows 7, see the following steps:
    1. Click Start , and then click Control Panel.
    2. Click System and Security.
      Figure 4: System and Security
      System and Security in Control Panel
    3. Click Windows Update in the System and Security window.
      Figure 5: Windows Update
      Windows Update in the Control Panel System and Security menu
    4. Click Check for updates to find the most recent updates for your computer.
      Figure 6: Check for updates
      Check for updates in Windows Update
    5. Install the desired updates:
      • Important updates: Security updates or updates that are important to the health of your computer.
      • Optional updates: Select driver updates or updates that are optional. It is a good idea to download and install optional driver updates, especially if you have changed the Windows edition on your computer.
HP personal computers with Windows come with HP Support Assistant installed. HP Support Assistant can be used to automatically find and install the latest updates for your computer. If needed, you can install the latest version of HP Support Assistant from the HP Support Assistant site (in English).
Follow these steps to open the HP Support Assistant and check for software and driver downloads:
  1. Double-click the HP Support Assistant desktop icon, or select HP Support Assistant from the Start menu.
  2. In HP Support Assistant, click Updates and tune-up.
  3. Click Check for updates now.
    HP Support Assistant checks for the latest updates from HP.
  4. If new updates are available, make sure the checkbox next to each update is checked, and then click Apply to begin downloading and installing the updates.
    If no new updates are available, click Finish.
For more information about configuring and using HP Support Assistant, please refer to one of the following support documents:
You can run the Power troubleshooter to adjust your computer's power settings. The Power troubleshooter checks things like your computer's timeout settings, which determine how long the computer waits before turning off the monitor display or entering sleep mode. Adjusting these settings can help you conserve power and extend your computer's battery life.
To run the Power troubleshooter, use the following steps:
  1. Click Start , and then click Control Panel.
  2. In the Search field, type troubleshooting.
  3. Click Troubleshooting.
    Figure 7: Troubleshooting
    Troubleshooting in the Control Panel
  4. Under System and Security, click Improve power usage.
    Figure 8: Improve power usage
    Improve power usage in the Troubleshooting menu
    If asked for an administrator password or confirmation, type the password or provide confirmation.
  5. Click Next to run the troubleshooting tool.
    Figure 9: Power troubleshooting
    Troubleshoot and help prevent computer problems with the Power troubleshooting tool
    A Detecting Issues window displays while Windows detects and fixes any issues.
  6. After troubleshooting is complete, close the troubleshooter or click Explore additional options if needed.

The computer wakes from sleep mode unexpectedly

If your computer wakes from sleep mode unexpectedly, see the information in this section to prevent hardware devices from waking the computer.
Some device settings can cause the computer to return from a power saving state unexpectedly. This can cause the computer to wake from sleep mode for no apparent reason. Activity from devices such as a wireless mouse, network, or high definition audio can cause the computer to wake. Network activity can cause the network hardware to wake the computer, especially when the network is always on (like cable and DSL connections).
Use the following steps to prevent hardware devices from waking the computer:
  1. Click Start , and then type Device Manager into the search field. Select Device Manager from the results list.
    Figure 10: Search results for Device Manager
    Control Panel with Device Manager selected
  2. Click the arrow next to the device that needs to be adjusted.
    • If you are using an optical mouse, select Mice and other pointing devices.
    • If the computer is using an "always-on" Internet connection, select Network Adapters.
    • To check the high definition audio settings, click Sound, video, and game controllers.
  3. Double-click the name of the device to open a Properties window.
  4. If the Power Management tab is available, proceed to the next step.
    If the Power Management tab is not available, click the Change Settings button. The same Properties window opens with the Power Management tab available.
    If you are prompted for an Administrator password or confirmation, type the password or provide confirmation.
  5. Click the Power Management tab, and remove the check mark next to Allow this device to wake the computer. You might need to repeat this step for each of the devices from the list above (mice, keyboards, and sound).
    Figure 11: Mouse Properties Power Management
    De-selecting a mouse in the Mouse Properties tab
    NOTE:If you prevent the mouse from being able to wake the computer, you can still wake the computer using the Sleep button on the keyboard or the Power button on the front of the computer.
  6. Click OK, close the windows that are open, and then restart the computer.
  7. Click Start , and then click Sleep from the Windows Shut down menu to see if the issue still exists.
    If the issue still exists, check for problems with connected devices.
Some devices can cause sleep/standby issues. Use these steps to check for a problem with the devices connected to the computer:
  1. Disconnect all non-essential connected devices (printers, scanners, USB drives, etc.).
  2. Restart the computer with only the original mouse, monitor, and keyboard connected.
    If this resolves the sleep/standby issue, one of the connected devices was causing the problem. Replace one device and test to see if the issue occurs again. Continue adding devices and testing until you find the device that is causing the problem.
    If the issue still exists, proceed to the next troubleshooting step.
Some viruses and other malicious applications can cause sleep/hibernate issues. It is therefore advisable to download/update antivirus applications and definitions, and run a scan.
Perform a virus scan to check the computer for possible viruses or other malicious applications that may be interfering with the sleep/hibernate modes.
For instructions on downloading and updating antivirus applications and definitions, and running a virus scan, refer to HP PCs - Resolving and Preventing Viruses on Your Computer (Windows 7, Vista, XP) .
If the issue still exists, proceed to the next troubleshooting step.
Malware applications can also cause sleep/hibernate issues. Windows Defender helps to prevent malware from infecting your computer in two ways:
  • Real-time protection: Windows Defender notifies you when malware tries to install itself or run on your computer. It also notifies you when applications attempt to change important settings.
  • Scanning options: You can use Windows Defender to scan for malware that might be installed on your computer and to automatically remove (or temporarily quarantine) anything that is detected during a scan.
Open Windows Defender and run a scan using the following steps:
  1. Click Start , and then enter windows defender in the search field. Select Windows Defender from the results list.
    Figure 12: Windows Defender
    Windows Defender search results
  2. Click the down-arrow next to Scan, and select one of the options to scan your computer for malware:
    Figure 13: Scan
    Scan options menu in Windows Defender
    • A Quick scan checks the places on the hard disk drive that malware is most likely to infect. To run a quick scan, click Quick scan from the drop-down menu.
    • A Full scan checks all files on your hard disk drive and all currently running programs. If you suspect that malware has infected your computer, run a full scan. A full scan might cause your computer to run slowly until the scan is complete. To run a full scan, click Full scan from the drop-down menu.
    • A Custom scan allows you to select drives and folders to scan. Click Custom scan, select the desired files and folders, and then click Scan now.

The computer will not go into sleep or hibernate mode

If the computer will not go into sleep or hibernate modes, use the following steps in order to troubleshoot.
Power settings control the computer’s ability to go into and come out of sleep/standby mode. Make sure the power options are set so the computer can use sleep/standby mode correctly.
The following steps provide detailed instructions:
  1. Click Start , and then click Control Panel.
  2. Click System and Security and then click Power Options. The Power Options window displays.
    Figure 14: Power Options
    Power Options window
  3. Select one of the available plans (Recommended Settings, Power saver, Balanced, or High performance).
  4. Click Change plan settings.
    In the System Settings window, configure the desired behavior of the Power button, the Sleep button, and the display panel lid, for when the computer is running on battery power and for when it is plugged in to a power source (if applicable).
  5. Click Save changes, and then restart the computer.
  6. Click Start , and then click Sleep from the Windows Shut down menu to see if the issue still exists.
  7. If the issue still exists, see Disabling hybrid sleep in Windows 7 .
Some drivers can be downloaded from HP, others can be downloaded from Microsoft using Windows Update, and others can be found only on the manufacturer's website. Having the most current BIOS version and drivers installed on your computer can resolve several issues.
To find the BIOS and driver updates available for your computer, check, in the following order, the following locations:
  • For instructions to update the BIOS of your computer, see the HP support document, Updating the BIOS .
  • For information and instructions on downloading and updating software and drivers, see the HP support document, Downloading or updating software and drivers for HP computers .
  • For information about using Windows Update for your computer in Windows 7, see the following steps:
    1. Click Start , and then click Control Panel.
    2. Click System and Security.
      Figure 15: System and Security
      System and Security in Control Panel
    3. Click Windows Update in the System and Security window.
      Figure 16: Windows Update
      Windows Update in the Control Panel System and Security menu
    4. Click Check for updates to find the most recent updates for your computer.
      Figure 17: Check for updates
      Check for updates in Windows Update
    5. Install the desired updates:
      • Important updates: Security updates or updates that are important to the health of your computer.
      • Optional updates: Select driver updates or updates that are optional. It is a good idea to download and install optional driver updates, especially if you have changed the Windows edition on your computer.
HP personal computers with Windows come with HP Support Assistant installed. HP Support Assistant can be used to automatically find and install the latest updates for your computer. If needed, you can install the latest version of HP Support Assistant from the HP Support Assistant site (in English).
Follow these steps to open the HP Support Assistant and check for software and driver downloads:
  1. Double-click the HP Support Assistant desktop icon, or select HP Support Assistant from the Start menu.
  2. In HP Support Assistant, click Updates and tune-up.
  3. Click Check for updates now.
    HP Support Assistant checks for the latest updates from HP.
  4. If new updates are available, make sure the checkbox next to each update is checked, and then click Apply to begin downloading and installing the updates.
    If no new updates are available, click Finish.
For more information about configuring and using HP Support Assistant, please refer to one of the following support documents:
Malware applications can also cause sleep/hibernate issues. Windows Defender helps to prevent malware from infecting your computer in two ways:
  • Real-time protection: Windows Defender notifies you when malware tries to install itself or run on your computer. It also notifies you when applications attempt to change important settings.
  • Scanning options: You can use Windows Defender to scan for malware that might be installed on your computer and to automatically remove (or temporarily quarantine) anything that is detected during a scan.
Open Windows Defender and run a scan using the following steps:
  1. Click Start , and then enter windows defender in the search field. Select Windows Defender from the results list.
    Figure 18: Windows Defender
    Windows Defender search results
  2. Click the down-arrow next to Scan, and select one of the options to scan your computer for malware:
    Figure 19: Scan
    Scan options menu in Windows Defender
    • A Quick scan checks the places on the hard disk drive that malware is most likely to infect. To run a quick scan, click Quick scan from the drop-down menu.
    • A Full scan checks all files on your hard disk drive and all currently running programs. If you suspect that malware has infected your computer, run a full scan. A full scan might cause your computer to run slowly until the scan is complete. To run a full scan, click Full scan from the drop-down menu.
    • A Custom scan allows you to select drives and folders to scan. Click Custom scan, select the desired files and folders, and then click Scan now.

Disabling the password requirement when resuming from sleep

If you are required to enter a password when you log on to your computer, the default setting will be the same for when the computer is resuming from sleep/hibernate mode.
Use the following instructions to eliminate the need to enter a password when resuming from sleep:
Use the following instructions to remove the requirement for entering a password on wake:
  1. Click Start , and then click Control Panel.
  2. Click System and Security and then click Power Options. The Power Options window displays.
    Figure 20: Power Options
    Power Options window
  3. Click Require a password on wakeup.
    Figure 21: Require a password on wakeup
    Require a password on wakeup in the Power Options menu
  4. Click Change settings that are currently unavailable.
  5. Select Don't require a password, and then click Save changes.
    Figure 22: Don't require a password (notebook example)
    Don't require a password option in the System Settings menu

Disabling hybrid sleep in Windows 7

The hybrid sleep setting might cause an issue with sleep mode. Use the following steps to disable hybrid sleep:
  1. Click Start , and then click Control Panel.
  2. Click System and Security and then click Power Options. The Power Options window displays.
    Figure 23: Power Options
    Power Options window
  3. Click High Performance from Power Options.
    Figure 24: High performance
    High performance power plan in Power Options
  4. Click Change plan settings, and then select Change advanced power settings.
    The Power Options Advanced settings window appears.
    Figure 25: Advanced settings
    Power Options Advanced settings window
  5. Click the plus (+) sign next to Sleep.
  6. Click the plus (+) sign next to Allow hybrid sleep.
  7. Select Off from the drop-down menu.
    Figure 26: Advanced Power Settings
    Power Options with Allow hybrid sleep Off selected
  8. Click OK.

Understanding Windows 7 sleep and hibernate

Sleep: Pressing the Sleep key on the keyboard or clicking Sleep from the Windows 7 Shut down menu causes the computer to go into sleep mode. Closing the display panel on a notebook can also put the notebook in sleep mode. Sleep mode saves the state of all open applications 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, in a notebook, maintaining the power to the memory modules can drain a battery if the notebook is not plugged in.
Hibernate: Clicking Hibernate from the Windows 7 Shut down menu (if available) causes the computer to go into the hibernate mode. Hibernate saves the state of all open applications to the hard disk, then completely powers off the computer. The computer consumes no power while in hibernate mode. When you restart the computer, the previous state of all open applications is restored. Restarting from hibernate mode might take longer than restarting from sleep mode. Use Hibernate when you do not need your computer for an extended period of time.

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