12. Microsoft Windows 3.1
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POWER MANAGEMENT SCREEN SAVER
The Display Power Manager for Windows 3.1 provides a mechanism to control the
amount of power used by a computer's monitor. It provides a total of 5 levels of power
savings.
The first level is a conventional screen saver that turns the screen black and bounces a
logo around. The black screen provides substantial power savings and the animation
lets you know that the computer is still active.
The other four levels of power savings are:
Reduced on mode
Reduced on mode is an optional power saving state that allows the computer to use
some power savings while still fully operational. Currently this is limited to some
portable computers that can lower the power usage on their LCD displays. This causes
some degradation of display quality.
Stand by mode
Stand by mode is an optional power saving state that gives minimal power savings, but
provides the fastest recovery time.
Suspend mode
Suspend mode is a mandatory state in which substantial power savings are achieved by
the display. The trade off is that recovery times are longer than from stand by mode.
Off mode
Off mode provides the highest level of power savings and the longest recovery times.
With this mode, the display is actually turned off so that recovery times are equivalent to
switching the monitor on.
These four levels match the power saving modes defined by the VESA VBE/PM
standard. As you move down from one mode to the next, the amount of power being
saved is greater, but so is the amount of time that it takes for a monitor to recover and
be ready to display data.
The screen saver will cycle through all of the selected power saving modes, one after
another, until the maximum selected power saving mode is reached. You can specify
the number of minutes each level is active. The number of minutes you specify for each
level is the number of minutes after the previous mode is enabled. It is not the total time
before entering that mode. To specify the number of minutes each level is active, follow
these steps:
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