Slow Resume from Hibernate Mode on Toshiba Tecra 8000 or Portege 7020

• Microsoft Windows 2000 Advanced Server
• Microsoft Windows 2000 Datacenter Server
• Microsoft Windows 2000 Professional
• Microsoft Windows 2000 Server

SYMPTOMS

When a Toshiba Tecra 8000 or Portege 7020 computer is in Hibernate mode, you may experience a slow boot when the computer resumes.

CAUSE

This behavior can occur if the Battery Mode setting in the computer's BIOS is set to Full Power. This setting is not set at full power because of a BIOS misrepresentation. This setting actually enables the PCI Clock Run power-saving feature, which causes all PCI peripherals not to run at full capacity until an ACPI-aware operating system is booted. When the computer resumes from Hibernate mode, the result is a slow boot (up to 150 percent longer than normal) because this takes place in the boot loader, which is not ACPI-aware.

RESOLUTION

To resolve this issue, change the following BIOS power-management options on your computer:

• Set the Battery Mode or BIOS Power Management option to User Setting instead of Full Power.



• Change the CPU Sleep Mode option to Disable.



• Change the Processing Speed option to High.



• Change the Cooling Method option to Performance.

MORE INFORMATION

The BIOS assumes that the computer is in a non-ACPI mode, and enables the built-in power management until Windows 2000 is completely booted and able to turn on ACPI again.

Note that the CPU speed may still be slower than expected, even if you change all of the settings listed above. For example, the Portege 7020 has another built-in power-saving feature that slows down the CPU if the remaining battery capacity is less than 50 percent until an ACPI-aware operating system overrides the setting.

Additional query words:

Keywords : kbenv kbhw
Version : WINDOWS:2000
Platform : WINDOWS
Issue type : kbprb