Comment # 1 on bug 1182346 from Takashi Iwai

Could you check the output of cat /sys/power/state?
Does this contain "disk"?

If yes, please try to hibernate manually via
  echo -n disk > /sys/power/state

But, before doing that, please take the current kernel log (the dmesg output),
and upload to Bugzilla as well as the output of hwinfo.