После обновления FreeType сломалось сглаживание в GTK

Bad font rendering after freetype2 upgrade

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There were some changes in the freetype2 version 2.10.3 which enable subpixel rendering.
This might look ugly without enabling lcdfilter at the same time.

You can create a symlink in /etc/fonts/conf.d/ to enable “lcddefault” as filter.

sudo ln -s /etc/fonts/conf.avail/11-lcdfilter-default.conf /etc/fonts/conf.d/