APM 1.0 Systems May Not Save and Restore All Hardware States (134536)
The information in this article applies to:
This article was previously published under Q134536 SYMPTOMS
Some system functionality may be lost when you resume from Suspend mode if
the following conditions exist:
- You activated Suspend mode with a hardware switch (such as a Suspend
button on the body of the computer).
- An MS-DOS session was active when you suspended the system.
- The computer contains an Advanced Power Management (APM) 1.0 BIOS.
For example, if you are playing an MS-DOS-based game with sound when you
suspend the system, sound support may not function when the system resumes.
CAUSE
When you suspend the system using a hardware switch, an APM 1.0-compliant
BIOS may process the suspend request too quickly for Windows 95 to save the
current hardware settings. Without these settings, Windows 95 may not be
able to reinitialize all the hardware devices properly when the system
resumes.
RESOLUTION
Use the Suspend command on the Start menu to suspend the system, instead of
using a hardware switch.
MORE INFORMATION
When a system suspend is requested with a hardware switch, the APM 1.0 BIOS
informs the operating system that it is about to suspend the system. APM
1.0 systems do not wait for a response from the operating system but simply
wait a predetermined amount of time before suspending the system.
APM 1.1 systems do not have this problem because Windows 95 can request
that they wait until the operating system is ready to be suspended.
| Modification Type: | Major | Last Reviewed: | 12/17/2000 |
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| Keywords: | KB134536 |
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