Install TLP (http://linrunner.de/en/tlp/docs/tlp-linux-advanced-power-management.html http://linrunner.de/en/tlp/docs/tlp-linux-advanced-power-man...), which yo

Install TLP (http://linrunner.de/en/tlp/docs/tlp-linux-advanced-power-management.html http://linrunner.de/en/tlp/docs/tlp-linux-advanced-power-man...), which you really should anyway for better battery life, and run 'sudo tlp -b'.