Microsoft KB Archive/162052

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Resume May Cause Power Off When in Standby Mode

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Q162052

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The information in this article applies to:


 * Microsoft Windows 95 OEM Service Release, versions 2, 2.1

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SYMPTOMS
When you suspend and then resume a laptop computer with the hardware Power/Resume button, the computer may power off instead.

CAUSE
The Windows 95 power management driver may not properly handle a suspend request and cause the computer to power off when the following conditions exist:


 * The computer is a laptop computer with a BIOS option to select the power-up (or resume) mode. Such an option determines whether the power button actually powers the computer on and off (for a full reboot), or simply suspends and resumes the computer.
 * The power-up (or resume) mode option is set to resume mode.
 * The computer is placed in its docking station and powered on.
 * The power button is pressed to place the computer in a suspended state.
 * The power button is pressed again to resume the computer.
 * Instead of resuming, the computer peforms a full power-off after about 30 seconds.

RESOLUTION
To work around this issue, set the power-up (or resume) mode option to boot mode instead of resume mode. This causes the computer to completely power off when it is shut down and perform a full boot when restarted, instead of suspending when shut down and resuming when restarted.

This issue is resolved by the following updated file for Windows 95 OEM Service Release versions 2, 2.1 and 2.5 (OSR2), and later versions of this file:

  VPOWERD.VXD  version 4.00.1112  dated 11/8/96  33,111 bytes NOTE: This update does not work with Windows 95 versions prior to OSR2.

STATUS
Microsoft has confirmed this to be a problem in Microsoft Windows 95 OEM Service Release 2 (OSR2). An update to address this problem is now available, but is not fully regression tested and should be applied only to computers experiencing this specific problem. Unless you are severely impacted by this specific problem, Microsoft does not recommend implementing this update at this time. Contact Microsoft Technical Support for additional information about the availability of this update.

This issue does not occur in Microsoft Windows 98.

MORE INFORMATION
Depending on the state of programs running when the computer is first suspended, current data that has not been saved to disk may be lost.

This symptom has been reported to occur with the following models of laptop computers:


 * Toshiba Tecra 710/720/730
 * Toshiba Tecra 500 Series
 * Toshiba Portege 650

For additional information about Windows 95 updates, please see the following article in the Microsoft Knowledge Base:

"Q161020 Implementing Windows 95 Updates" Additional query words: 95

Keywords : kbhw osr2 win95

Issue type : kbprb

Technology : kbWin95search kbOPKSearch kbWin95OPKOSR2 kbWin95OPKOSR210