Got the same thing with ion3 failing to start. I fixed it by moving the old directory out of the way, and making a symlink from the old (xorg.conf) font dir to the new dir.
-- failing to find fonts: dexconf writes bogus FontPaths https://launchpad.net/bugs/63408 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs