An other affected user have found the reason of that error: some hardware not supporting APM policy
See comment #3 of https://bugs.launchpad.net/ubuntu/+source/hdparm/+bug/1470014
An other affected user have found the reason of that error: some hardware not supporting APM policy
See comment #3 of https://bugs.launchpad.net/ubuntu/+source/hdparm/+bug/1470014