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Power Management tips for Windows Vista - Notebooks

No indication on display during the transition to sleep, hibernate, or hybrid sleep state
After resuming from hibernation, the system will automatically re-enter hibernation after about 2 minutes of inactivity
The computer resumes from sleep if a USB keyboard/Mouse is detached
Battery icons show its status differently on the Windows taskbar and in the Windows Mobility Center
Power Management driver included in Windows Vista and available on Windows Update do not function correctly
Power Management driver does not cover all ACPI features with Windows Vista


Symptom
When the computer goes into the sleep, hibernate, or hybrid sleep state, there is no indication on the display for users to notify that the computer is still in transition to the sleep, hibernate, or hybrid sleep state. Once the computer begins to go into one of these states, the display will black out at once. With this behavior, mobile users may think the computer has finished the state change and may carry and move the computer while the hard drive is still running. This may cause damage to the hard drive.

Affected configurations
Sleep and Hibernate
  • It is common for all ThinkPad 3000 Famiy notebook systems running Microsoft Windows Vista.

Hybrid Sleep

  • It is common for the following notebooks that support WDDM graphics and run Windows Vista:
    • ThinkPad R50p, R51e, R52 (with ATI graphics only, or with Machine Type: 1846, 1847, 1848, 1849, 1850, 1870), R60, R60e
    • ThinkPad T41p, T42 (with ATI Mobility Radeon 9600 graphics only), T42p, T43 (with ATI graphics only, or with Machine Type: 2668, 2669, 2678, 2679, 2686, 2687), T43p, T60, T60p
    • ThinkPad X60, X60s, X60 Tablet
    • ThinkPad Z60m (with ATI graphics only), Z61e, Z61m, Z61p, Z61t
    • ThinkPad G50
    • 3000 C200, N100, V100

Solution
To avoid causing damage to the hard drive, mobile users should wait until the hard drive LED turns off and the sleep LED turn on when the computer goes into the sleep or hybrid sleep mode. You should wait for hard drive LED and sleep LED to turn off when the computer goes into the hibernate state.

Additional information
This is by design of Windows Vista. It does not provide the message "Preparing to Sleep..."(or "Preparing to Hibernate...") on the display like in Windows XP.



Symptom
After your computer resumes (or "wakes up") from hibernation, it enters hibernation again after two minutes of inactivity, regardless of the settings you have configured in the Power Options of the Control Panel.

Affected configurations
Any notebook system running Windows Vista.

Solution
After resuming from hibernation, if you can make some operation, for example, moving the trackpoint or typing on the keyboard or running an application and so on, then the system will not go back into hibernation state.

Additional information
This is by design of Windows Vista.

 

Symptom
When your computer is in the slleep state with a USB keyboard or mouse is attached, and the USB keyboard or mouse is detached, the computer resumes automatically.

Affected configurations
All ThinkPad systems running Windows Vista.

Solution
Uncheck "Allow this device to wake up the computer" in the Keyboard /Mouse properties in Device Manager.

Additional information
It is a limitation of Windows Vista. The "Allow this device to wake the computer" in Keyboard /Mouse properties in Device Manager is enabled by default in Vista.

 

Symptom
In the Power Option of Windows Mobility Center, if the Critical Battery Level is set higher than the Low Battery Level in spite of the warning, and if the Critical battery action is set to "Do Nothing in the Group Policy", then the battery icon indicates its status differently, as shown below. On the taskbar, a white "X" mark in a red circle is the indicates Critical Battery Level. In the Windows Mobility Center, a blank exclamation mark in a yellow trianble indicates Critical Battery(a white "X" mark in a red circle) and in the Windows Mobility Center (a black exclamation mark in a yellow triangle) when battery discharges to Critical Battery Level.

Windows Mobility Center

Affected configurations
Any notebook system running Windows Vista.

Solution
Set the Critical Battery Level lower than the Low Battery Level in Power Options.

Additional information
It is a limitation of Windows Vista, if the Critical Battery Level is set higher than Low Battery Level, Windows Vista will only give a warning and does not force user not to continue it.

 

Symptom
The generic PM driver included in Windows Vista and the ThinkPad PM driver version 1.33 which is available on Windows Update does not function correctly.

Affected configurations
Any ThinkPad system running Windows Vista.

Solution
The correct and best suited driver for the affected systems is the ThinkPad PM Driver version 1.41 or later available from Lenovo Support and downloads Web site.

Additional information
The Windows Vista inbox PM Driver is generic and does not cover all ThinkPad features. The ThinkPad PM driver available on Windows Update is an older driver (version 1.33) which also does not cover all of the ACPI features available on ThinkPad systems.

 

Symptom
The PM driver included in Windows Vista for the 3000 Family notebooks does not cover all of the ACPI features available to systems with Windows Vista.

Affected configurations
Any of the following systems running Windows Vista:
  • 3000 C200, N100, V100

Solution
You need to download the latest PM Driver from Lenovo Support and downloads Web site. You will be able to uninstall the PM driver included in Windows Vista before installing the latest driver.

Additional information
The PM driver included in Windows Vista for the 3000 Family notebooks is an older driver.