Bug#704865:

[Wirawan Purwanto]

This error seems to affect many other people and in different
settings, although most are screensaver-related, but the root cause
may not be the screensaver itself:

https://bugs.launchpad.net/ubuntu/+source/gnome-screensaver/+bug/1085706

On my computer, running Linux Mint 17 based on Ubuntu 14.04, the
cinnamon screensaver was affected. It came up with this error shown on
syslog:

    cinnamon-screensaver-dialog: pam_ecryptfs: seteuid error

This was 15 seconds after the last event recorded on the syslog
(issued by NetworkManager, wpa_supplicant, and anacron).

Wirawan