Comment 2 for bug 729470

Neither do attempts at forced subsetting work:

  grub-mkfont -v -v -v -v -s16 -o UbuntuBetaMono500-hacked.pf2 --range=0x0-0x1f,0x100-0x1ffff /usr/share/fonts/truetype/unifont/unifont.ttf --range=0x20-0x7f UbuntuBetaMono500-hacked.[ot]tf

Here, the first use of '--range' is taken as the canonical one and applied to the (output) rather than the following input(s).