Wake-On-Lan (WOL) is not working when machine is in hibernate or in standby mode.
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Wake-On-Lan (WOL) is not working when machine is in hibernate or in standby mode.

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Article ID: 176965

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Updated On:

Products

IT Management Suite

Issue/Introduction

Wake-On-Lan (WOL) seems to be not working when a machine is hibernated, in standby or in sleep mode. Customer noticed that their computers fail to startup when Wake-On-LAN task is run after computers go into hibernation. However, Wake-On-LAN works when the computers are shutdown completely.

Cause

In order for WOL to work when computer goes on Standby & Hibernation mode, NIC card Power Management configuration is required. By Default Windows turn this feature off to save power.
See Microsoft KB article "How to disable power management for a network adapter when you deploy Windows XP" (http://support.microsoft.com/kb/837058)

Resolution

You will need to allow the computer to turn on rather than turn off this device to save power.
Use the information provided on Microsoft KB article "How to disable power management for a network adapter when you deploy Windows XP" (http://support.microsoft.com/kb/837058)

Basically to use Registry Editor to disable the "Allow the computer to turn off this device to save power" network adapter setting for a single computer, follow these steps:

1. Click Start, click Run, type regedit in the Open box, and then click OK.
2. Locate and then click the following registry subkey:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E972-E325-11CE-BFC1-08002bE10318}\DeviceNumber

Note: DeviceNumber is the network adapter number. If a single network adapter is installed on the computer, the DeviceNumber is 0001.

3. Click PnPCapabilities.
4. On the Edit menu, click Modify.
5. In the Value data box, type 38, and then click OK.

Note By default, a value of 20 indicates that power management of the network adapter is enabled. A value of 38 will prevent Windows XP from turning off the network adapter or let the network adapter wake the computer from standby.

6. On the File menu, click Exit.

Note: You can use Article ID: 3150 "How to Delete a Registry Key" as a reference of how to deploy the regkey to multiple machines.

Applies To
Notification Server 6.0.6074 SP3
Windows XP

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