This seems to explain it, currently trying to teach myself apparmor to find a temporary fix...
apps kernel: [ 707.036112] audit: type=1400 audit(1445331859.865:41): apparmor="DENIED" operation="mount" info="failed type match" error=-13 profile="/usr/bin/lxc-start" name="/dev/ptmx" pid=2746 comm="lxc-start" srcname="/dev/pts/ptmx" flags="rw, bind"
This seems to explain it, currently trying to teach myself apparmor to find a temporary fix...
apps kernel: [ 707.036112] audit: type=1400 audit(144533185 9.865:41) : apparmor="DENIED" operation="mount" info="failed type match" error=-13 profile= "/usr/bin/ lxc-start" name="/dev/ptmx" pid=2746 comm="lxc-start" srcname= "/dev/pts/ ptmx" flags="rw, bind"