Consider the following scenario:

• You watch live TV or a DVD in Windows Media Center on a Windows Vista Home Premium-based computer or on a Windows Vista Ultimate-based computer.
• You pause the live TV program or the DVD.
• You use the Start menu, a sleep button on the keyboard, or a Windows Media Center remote control to put the computer to sleep.
• You wake the computer, and then you try to continue watching the live TV program or the DVD.

In this scenario, you can view the video part of the live TV program or of the DVD. However, you cannot hear the accompanying audio.

When you put a Windows Vista-based computer to sleep or into hibernation, or when you resume the computer from sleep or from hibernation, you receive a Stop error message that resembles the following:

*** STOP: 0×0000009F (parameter1, parameter2, parameter3, parameter4)
DRIVER_POWER_STATE_FAILURE

You may occasionally experience the following symptoms when you wake a Windows Vista-based computer from sleep:

• A Bluetooth device no longer works correctly.
• When you view the Bluetooth device in Device Manager, an exclamation mark in a yellow circle is displayed for the device. When you view the properties of the device, the status for the device reports Code 43. This status code indicates that Windows has stopped the device because the device has reported problems.

This problem occurs on a system in which a Bluetooth device is connected through a universal serial bus (USB) connection.

Note: Certain USB devices may be integrated into the system, and they may be connected to an internal hub. For example, a portable computer may have a single USB bus. In this situation, the computer may use an internal USB hub to provide two or more available USB ports on the computer.

Consider the following scenarios:

• An additional monitor is connected to a Windows Vista-based desktop computer. The additional monitor is designated as the primary display (the main monitor). The computer goes into hibernation or goes to sleep. This additional monitor is disconnected. The computer resumes from sleep or from hibernation.
• An external monitor is connected to a portable Windows Vista-based computer. The additional monitor is designated as the primary display (the main monitor). The built-in screen is designated as the secondary display. The computer goes into hibernation or goes to sleep. This external monitor is disconnected. The computer resumes from sleep or from hibernation.

In these scenarios, you cannot see the logon screen. Therefore, you cannot log on to the computer.

Consider the following scenario:

• You are running a Windows Vista-based computer.
• A USB speaker is connected to the computer.
• You resume the computer from sleep or from hibernation.
• You use Windows Media Player to play music.

In this scenario, you cannot adjust the volume for the USB speaker. This is true even when you move the volume slider up or down or click the mute button in either of the following locations:

• In Windows Media Player
• In the Windows Vista sound control panel

When you use the Photos screen saver in Windows Vista, the computer does not automatically go to sleep. You expect the computer to go to sleep when it reaches the idle time-out.

Consider the following scenario:

• You are running a Windows Vista-based computer.
• The computer has a universal serial bus (USB) keyboard connected to it.
• You resume the computer from sleep or from hibernation.

In this scenario, the LED lights that represent the NUM LOCK key, the CAPS LOCK key, and the SCROLL LOCK key on the USB keyboard do not resume their previous status. These lights remain turned off regardless of the status of the NUM LOCK key, the CAPS LOCK key, and the SCROLL LOCK key.

You are running the Traditional Chinese (CHT) version of Windows Vista. When you open the Power Options item in Control Panel, the words “hibernates” or “hibernation” appear instead of the words “sleeps” or “sleep” in certain areas of the user interface. For example, you experience the following symptoms:

• When you view the task pane of the Power Options item, the following line incorrectly contains the word “hibernates”:
  

  Change when the computer hibernates

• When you click Change plan settings, the following line incorrectly contains the word “hibernation”:
  

  Put the computer to hibernation

A high definition audio (HDA) device may no longer work after you resume a Windows Vista-based computer from hibernation or from sleep. The HDA device may be a sound device or a modem. You may see an “X” character appear on the speaker icon in the notification area.

Because of this problem, you no longer hear any sound. Or, you cannot use the modem. This problem occurs even though you have installed the update that is described in Microsoft Knowledge Base article 929685. For more information, click the following article number to view the article in the Microsoft Knowledge Base:

929685 A high definition audio device may no longer work after you resume Windows Vista from hibernation or from sleep

When you wake a Windows Vista-based computer from sleep, you may receive a Stop error message that resembles the following:

*** STOP: 0×000000B8 (parameter1, parameter2, parameter3, parameter4)
ATTEMPTED_SWITCH_FROM_DPC

This problem occurs if you have installed the update that is described in the following Microsoft Knowledge Base article:

929762 (support.microsoft.com/kb/929762/) You receive a Stop 0×9F error when you wake a Windows Vista-based computer that is connected to an IEEE 1394-based device

Note: Update 929762 is available as a critical update from the following Microsoft Web site: