/usr/share/xscreensaver/config/lcdscrub.xml is in xscreensaver-data-extra 5.30-1+deb8u2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 | <?xml version="1.0" encoding="ISO-8859-1"?>
<screensaver name="lcdscrub" _label="LCDscrub">
<command arg="-root"/>
<number id="delay" type="slider" arg="-delay %"
_label="Frame rate" _low-label="Low" _high-label="High"
low="0" high="5000000" default="100000"
convert="invert"/>
<hgroup>
<vgroup>
<number id="spread" type="spinbutton" arg="-spread %"
_label="Line spread" low="2" high="64" default="8"/>
<number id="cycles" type="spinbutton" arg="-cycles %"
_label="Cycles" low="1" high="600" default="60"/>
<boolean id="showfps" _label="Show frame rate" arg-set="-fps"/>
</vgroup>
<vgroup>
<boolean id="hw" _label="Horizontal white" arg-unset="-no-hw"/>
<boolean id="vw" _label="Vertical white" arg-unset="-no-vw"/>
<boolean id="dw" _label="Diagonal white" arg-unset="-no-dw"/>
</vgroup>
<vgroup>
<boolean id="w" _label="Solid white" arg-unset="-no-w"/>
<boolean id="rgb" _label="Primary colors" arg-unset="-no-rgb"/>
<boolean id="hb" _label="Horizontal black" arg-unset="-no-hb"/>
</vgroup>
<vgroup>
<boolean id="vb" _label="Vertical black" arg-unset="-no-vb"/>
<boolean id="db" _label="Diagonal black" arg-unset="-no-db"/>
<boolean id="b" _label="Solid black" arg-unset="-no-b"/>
</vgroup>
</hgroup>
<xscreensaver-updater />
<_description>
repairs burn-in on LCD monitors. This saver is functional,
rather than pretty.
Believe it or not, screen burn is not a thing of the past.
It can happen to LCD screens pretty easily, even in this modern age.
However, leaving the screen on and displaying high contrast images
can often repair the damage. That's what this screen saver does.
See also:
http://docs.info.apple.com/article.html?artnum=88343
http://toastycode.com/blog/2008/02/05/lcd-scrub/
Inspired by the like-named program by Daniel Sandler.
Written by Jamie Zawinski; 2008.
</_description>
</screensaver>
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