in your dmesg there is something strange like:
$ dmesg | grep micro
Atom PSE erratum detected, BIOS microcode update recommendeddon't worry'bout; only thing you have to do is updating your BIOS microcode with microcode.dat you can find there [intel site].
if you use Arch Linux, its very easy to solve:
you are able to download from [extra]repository an out-dated package
microcode_ctl: install it.
then copy the [latest!] microcode.dat you have downloaded from Intel website
in /etc/microcode.dat
the add "microcode" on array daemons in rc.conf.
reboot and now should works.
credits to thestinger & graysky