Considering the following scenario:

• You have a Windows Vista-based or Windows Server 2008-based portable computer that is connected to an external monitor.
• You set the external monitor as the main monitor.
• The external monitor has a screen resolution that differs from the portable computer’s built-in monitor.
• You put the portable computer into sleep or in hibernation.
• You remove the external monitor.

In this scenario, when you wake the portable computer, the logon screen is not resized correctly. For example, the logon window may be smaller or larger than the screen on the portable computer.

Consider the following scenario:

• You have a multiprocessor computer that is running Windows XP, Windows Server 2003, or Windows Vista.
• You resume the computer from hibernation (S4).

In this scenario, the computer stops responding on a black screen.

When you put a Windows Vista-based computer to sleep or into hibernation, the system does not display a progress bar that indicates the sleep or hibernation progress as it does in Windows XP.

Consider the following scenario:

• You are running Windows Vista or Windows Server 2008 on a computer.
• You create a scheduled task to run at a given time.
• You configure the scheduled task to wake the computer to run.
• You put the computer in hibernation (S4).

In this scenario, the computer comes out of hibernation at the expected time. However, the scheduled task may not run as expected.

Consider the following scenario:

• You have a computer that is running Windows Server 2008 or Windows Vista Service Pack 1 (SP1).
• This computer supports hot-plugging of Peripheral Component Interconnect (PCI) Express graphics cards.
• While the computer is asleep (S3) or in hibernation (S4), you hot-unplug a PCI Express graphics card.
• You resume the computer from sleep or from hibernation.

In this scenario, when you open the Display settings item in Control Panel, you receive the following error message:

The currently selected graphics display driver can not be used. It was written for a previous version of Windows, and is no longer compatible with this version of Windows.
The system has been started using the default VGA driver.

On the Monitor tab, the unplugged graphics card is still listed. Additionally, if you reinsert the graphics card, the old item for the previously unplugged graphics card remains, and a new item for the same graphics card is added to the list of available graphics cards.

Note: This problem does not occur if you unplug the graphics card by using the Safely Remove Device icon in the notification area.

Consider the following scenario:

• You have a computer that is running Windows Vista or Windows Server 2008.
• A compact flash (CF) card is plugged into a CF card slot on the computer.
• You try to resume the computer from hibernation (S4).

In this scenario, the computer may stop responding instead of resuming correctly. Eventually, you may receive the following Stop error message:

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

This problem occurs only occasionally.

When you put a Windows Vista-based computer or a Windows Server 2008-based computer into hibernation, the system may crash. Additionally, you may receive a Stop error message that resembles one of the following messages:

• STOP 0×000000A0 (parameter1, parameter2, parameter3, parameter4)
  INTERNAL_POWER_ERROR (a0)
• STOP 0×0000007a (parameter1, parameter2, parameter3, parameter4)
  KERNEL_DATA_INPAGE_ERROR
• STOP 0×00000077 (parameter1, parameter2, parameter3, parameter4)
  KERNEL_STACK_INPAGE_ERROR

This problem occurs only occasionally. Currently, the problem is found on computers that have SB700 Southbridge chipsets installed.

After you resume a Windows Vista-based DHCP client computer from sleep or from hibernation, the computer may lose its IP address. This problem may occur if there is more than one network interface on the computer, such as a real network interface and a virtual private network (VPN) interface.

For example, consider the following scenario:

• On a Windows Vista-based DHCP client computer, you establish a Secure Sockets Layer (SSL) VPN connection to a remote VPN server.
• You disconnect the SSL VPN connection.
• You put the computer to sleep or into hibernation.
• You resume the computer from sleep or from hibernation.

In this scenario, the computer loses the IP address that was assigned to it by the DHCP server. Instead, an Automatic Private IP Addressing (APIPA) address, such as 169.254.0.1, is assigned to the client computer. Therefore, you cannot access some network resources.

Assume that a Secure Digital (SD) memory card slot is enabled on a Windows Vista-based or Windows Server 2008-based computer. When you try to put the computer into either standby or hibernation, the system stops responding (hangs).

This problem occurs randomly.

Consider the following scenario:

• You connect a Windows Vista-based computer to a wireless network.
• You put the computer into hibernation (S4).
• The computer resumes from hibernation and then tries to connect to a new wireless network from its preferred network list.

In this scenario, the computer waits 30 seconds before it starts connecting to the new wireless network.