Sony PCG-954A Manual

You can change the power management settings, such as the system timer and the 
brightness of the screen.

Click the Current Profile icon on the Power Management toolbar.

Select Edit/Create Profiles from the menu.

Click a profile whose setting you want to change from the list in the left 
field.

Double-click an item whose setting you want to change from the list in the 
right field.

Click the desired setting.

Click the File menu, and then click Save.

Click the File menu, and then click Exit.

The PowerPanel utility provides several predefined power management profiles. 
Each profile consists of a group of power management settings that are designed 
to meet specific power management goals—ranging from maximum power 
management to no power management. You can change the settings for any of the 
predefined profiles (except for the Disable Power Management profile), or you 
can create your own profile to suit your portable computing needs. The 
predefined profiles are:

Provides the best system performance while still conserving power.

Provides power saving features to give you maximum battery life and good 
performance. It slows the computer and puts it into Standby mode after a 
specified time period.

Turns off all power management features such as Standby and Hibernate modes.
You can not change the settings of this profile.