I got hit by this when using the 3.10.17 generic kernel:
https://bugs.archlinux.org/task/36288
It happened on both a Thinkpad T420 and a T430. I grabbed the 3.10.30 kernel from kernel.org and compiled it using the generic config, and now the problem seems to have gone away. At least I haven't had /var/log/syslog fill up with mad amounts of mei_me notices since the upgrade.
As far as I've been able to figure out, this was supposed to have been fixed back in 3.10.5, so I guess 3.10.17 regressed in regards to this.
Maybe a kernel update for Slackware64 14.1 is in order?
