Is there a screen saver that does not use excessive CPU? From: Don Buchholz

Try using xlock with these options:

xlock -mode life -count 1500 -nice 20 -root

From: (Pranav Vakil)

Use mlock -hide to hide the background. You can also modify the mlock
(/usr/local/tools/mlock) code to allow the standard X screen saver to
take effect. The timeout value is originally set to 0 which means the
screen saver is off. Modify this to be 120 (2 minutes) and set the
interval time to be 60 (1 minute). Using these intervals, I have found
that over a 24 hour period, it uses only .3 cpu minutes.
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