This doesn't just affect Steam. I see the same error when running Cura (3D printer slicer program). See attached log.
** Attachment added: "Cura-2.6.0.log" https://bugs.launchpad.net/ubuntu/+source/fontconfig/+bug/1416768/+attachment/4900919/+files/Cura-2.6.0.log -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1416768 Title: Fontconfig error output due to malformed conf file To manage notifications about this bug go to: https://bugs.launchpad.net/hundredpapercuts/+bug/1416768/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs