/etc/fonts/conf.avail/53-monospace-lcd-filter.conf is in fontconfig-config 2.11.0-0ubuntu4.
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 | <?xml version="1.0"?>
<!DOCTYPE fontconfig SYSTEM "fonts.dtd">
<!-- conf.d/monospace-lcd-filter.conf -->
<fontconfig>
<!-- Use legacy LCD filter on smaller Monospace fonts -->
<match target="font">
<test name="family">
<string>DejaVu Sans Mono</string>
<string>Bitstream Vera Sans Mono</string>
</test>
<test name="pixelsize" compare="less_eq">
<double>12.0</double>
</test>
<edit name="lcd_filter" mode="assign">
<const>lcdlegacy</const>
</edit>
<edit name="hintstyle" mode="assign">
<const>hintfull</const>
</edit>
</match>
</fontconfig>
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