Laurent, what is your output of "fc-match Helvetica-Bold"? Mine is n019003l.pfb: "Nimbus Sans L" "Regular", which is installed by the gsfonts and gsfonts-x11 packages...
Laurent, what is your output of "fc-match Helvetica-Bold"? Mine is n019003l.pfb: "Nimbus Sans L" "Regular", which is installed by the gsfonts and gsfonts-x11 packages...