sets the screen saver parameters.
This option accepts up to two numerical parameters, a blank/noblank
flag, an expose/noexpose flag, an on/off flag,
an activate/reset flag, or the default flag.
If no parameters or the default flag is used, the system will
be set to its default screen saver characteristics.
The on/off flags simply turn the screen saver functions on or off.
The activate flag forces activation of screen saver even if the screen
saver had been turned off.
The reset flag forces deactivation of screen saver if it is active.
The blank flag sets the
preference to blank the video (if the hardware can do so) rather than
display a background pattern, while noblank sets the
preference to display a pattern rather than blank the video.
The expose flag sets the
preference to allow window exposures (the server can freely discard
window contents). noexpose sets the preference to disable
screen saver, unless the server can regenerate the screens without
causing exposure events.
The length and period
parameters for the screen saver function determines how long the
server must be inactive for screen saving to activate, and the period
to change the background pattern to avoid burn in.
The arguments are specified in seconds.
If only one numerical parameter is given, it will be used for length.