Power Management Modes - Acer Extensa 390 User Manual

Operating on Battery Power
Note: We recommend you enable heuristic power
management to prolong your battery life.

2.2.1 Power Management Modes

Display Standby Mode
Screen activity is determined by the keyboard, the
built-in touchpad, and an external PS/2 pointing
device. If these devices are idle for the period
determined by the computer's HPM unit, the
display shuts off until you press a key or move the
touchpad or external mouse.
" A utomatic Dim" Feature
The computer has a unique "automatic dim"
power saving feature. When the computer is using
AC power and you disconnect the AC adapter from
the computer, it automatically dims the LCD
backlight to save power. If you reconnect AC
power to the computer, it automatically adjusts
the LCD backlight to a brighter level.
Hard Disk Standby Mode
The hard disk enters standby mode when there are
no disk read/write operations within the period of
time determined by the computer's HPM unit. In
this state, the power supplied to the hard disk is
reduced to a minimum. The hard disk returns to
normal once the computer accesses it.
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