[arch-general] Fine-tuning font settings (GTK?)

[Robbie Smith]

Although it's improved a lot, I still get the occasional colour fringes 
around some glyphs, and I find that really distracting. Yet for some 
reason the subpixel rendering seems set as default, and no setting I 
change switches back to the greyscale rendering that looks far better to 
me. This only affects GTK+ applications, and I only get the fringes 
around a handful of characters on black-on-white, but it's enough to be 
noticeable when I'm tired or I have the screen brightness turned up.

I've tried changing settings locally in ~/.config/gtk3/settings.ini, 
I've tinkered with the settings in /etc/fonts (including creating a 
custom style with Infinality), and yet it still persists. Does anyone 
know how to fix it?

I have these settings in fontconfig's conf:

<match target="font">
   <edit name="rgba" mode="assign">
     <const>none</const>
   </edit>
   <edit name="hinting" mode="assign">
     <bool>true</bool>
   </edit>
   <edit name="autohint" mode="assign">
     <bool>true</bool>
   </edit>
   <edit name="antialias" mode="assign">
     <bool>true</bool>
   </edit>
   <edit name="hintstyle" mode="assign">
     <const>hintslight</const>
   </edit>
   <edit name="lcdfilter" mode="assign">
     <const>lcddefault</const>
   </edit>
</match>

And the GTK settings.ini has:

gtk-xft-antialias = 1
gtk-xft-hinting = 1
gtk-xft-hintstyle = hintslight
gtk-xft-rgba = none