Comment 8 for bug 911507

I have the same problem:

Apr 13 21:19:10 euclides kernel: [46490.571078] Valid eCryptfs headers not found in file header region or xattr region, inode 8952199
Apr 13 21:19:10 euclides kernel: [46490.571081] Either the lower file is not in a valid eCryptfs format, or the key could not be retrieved. Plaintext passthrough mode is not enabled; returning -EIO