The monitor may not turn on after you configure the energy-saving settings on some portable computers (823348)


The information in this article applies to:

  • Microsoft Windows XP Professional SP1
  • Microsoft Windows XP Professional SP1a
  • Microsoft Windows XP Professional SP2
  • Microsoft Windows XP Home Edition SP1
  • Microsoft Windows XP Home Edition SP1a
  • Microsoft Windows XP Home Edition SP2

SYMPTOMS

After you configure the energy-saving settings for a liquid crystal display (LCD) monitor by using the following steps, some portable computers that are running Windows XP SP1 may enter a state where the monitor does not turn on again, even though you press a key on the keyboard.
  1. In Control Panel, double-click Power Options. The Power Options Properties dialog box appears.
  2. Under Plugged in, set Turn off monitor to After 1 min.
  3. Wait for the monitor to turn off after 1 minute.
  4. Close the lid of the portable computer.
  5. Disconnect the computer from the power source.
  6. Open the lid of the portable computer.

    The monitor may not come on, even after you press a key on the keyboard.
.

CAUSE

This error results from a process timing issue for the LCD Power revert in Windows XP SP1.

RESOLUTION

To resolve this issue, create the following registry key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\GraphicsDrivers
LidCloseSetPower

WARNING: If you use Registry Editor incorrectly, you may cause serious problems that may require you to reinstall your operating system. Microsoft cannot guarantee that you can solve problems that result from using Registry Editor incorrectly. Use Registry Editor at your own risk.

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.
Modification Type:MajorLast Reviewed:5/19/2005
Keywords:kbinfo KB823348 kbAudDeveloper
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