Comment 15 for bug 150691

Then cupsd is also not correct, for something there must be LC_PAPER.

CUPS is supporting libpaper natively, at least if libpaper-dev is installed when CUPS is compiled. Perhaps one should explicitly cancel the libpaper support via a ./configure option (How is it done by Red Hat?).

In general, we must reach a state where every program looking for a default paper size should do it exactly the same way.