This looks like a possibly useful datapoint that showed up in dmesg at some point during my ongoing debugging / diagnosis attempts:
> dmesg | grep ryptfs [ 782.510299] Mount on filesystem of type eCryptfs explicitly disallowed due to known incompatibilities -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/623708 Title: duplicate files/directories when mounted -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
