Article ID: 317279 - Last Review: January 31, 2007 - Revision: 2.6

Serial.sys Does Not Power Devices On If "EnablePowerManagement" Is Set

Hotfix Download Available
View and request hotfix downloads

View products that this article applies to.

System TipThis article applies to a different operating system than the one you are using. Article content that may not be relevant to you is disabled.

This article was previously published under Q317279

SYMPTOMS

If you set the EnablePowerManagement registry value to 1 as specified in the following Microsoft Knowledge Base article, Serial.sys does not power on the attached device when you resume the computer from standby:

275042 (http://support.microsoft.com/kb/275042/EN-US/ ) Modem Powers Off When It Is Not in Use

Back to the top

RESOLUTION

Windows XP

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support (http://support.microsoft.com/contactus/?ws=support)

Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language. The English version of this fix for Windows XP should have the following file attributes or later:

   Date         Time   Version      Size    File name    
   ---------------------------------------------------
   18-Feb-2002  19:19  5.1.2600.29  60,800  Serial.sys

Back to the top

Windows 2000

To resolve this problem, obtain the latest service pack for Windows 2000. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

260910 (http://support.microsoft.com/kb/260910/EN-US/ ) How to Obtain the Latest Windows 2000 Service Pack

The English version of this fix for Windows 2000 should have the following file attributes or later:

   Date         Time   Version        Size    File name
   -----------------------------------------------------
   06-Mar-2002  11:06  5.0.2195.5031  60,720  Serial.sys

Back to the top

STATUS

Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article. This problem was first corrected in Windows 2000 Service Pack 3.

Back to the top

MORE INFORMATION

For additional information about how to obtain a hotfix for Windows 2000 Datacenter Server, click the article number below to view the article in the Microsoft Knowledge Base:

265173 (http://support.microsoft.com/kb/265173/EN-US/ ) The Datacenter Program and Windows 2000 Datacenter Server Product

For additional information about how to install multiple hotfixes with only one reboot, click the article number below to view the article in the Microsoft Knowledge Base:

296861 (http://support.microsoft.com/kb/296861/EN-US/ ) Use QChain.exe to Install Multiple Hotfixes with One Reboot

Back to the top