"hintstyle" setting on fonts.conf seems to be ignored.
I understand it is impossible to set "rgba=rgb" and "hintstyle=hintslight" at the same time because of freetype restriction.
But even if "rgba=none", "hintstyle" setting is ignored.
A patch to fix this bug:
@@@ -1404,7 +1616,7 @@
options->base.subpixel_order = other->base.subpixel_order;
- if (options->base.hint_style == CAIRO_HINT_STYLE_DEFAULT)
+ if (other->base.hint_style != CAIRO_HINT_STYLE_DEFAULT)
options->base.hint_style = other->base.hint_style;
if (other->base.hint_style == CAIRO_HINT_STYLE_NONE)
Looks very similar to bug 11838.
They do indeed seem to be describing the same bug...
*** This bug has been marked as a duplicate of bug 11838 ***