Comment 63 for bug 937200

I understand the fontconfig part better now. UnDotum is listed (in /etc/fonts/conf.d/65-nonlatin.conf) as an alternative for sans-serif. Ubuntu is not mentioned anywhere, meaning it would only appear in fc-match -s output if there are glyphs that no other font provides. Adding Ubuntu to the appropriate families in 60-latin.conf would help with this; maybe I'll file a wishlist bug to that effect, if there isn't one already.

So IMO this does come back to being a bug in openjdk-7, where fonts that aren't included in the early fontconfig "top 10" results (but some of their siblings, e.g. of a different style, are) aren't included in the appropriate FontFamily.

Am I close? :)