Bug#697548: consumption on T420

[Gaëtan PERRIER <gaetan.perrier@neuf.fr>]

Hi,

I've tried with the newer 3.7.8 and after the first reboot (after the
installation) it seemed good but after another reboot the consumption goes
high. Powertop reports 23/25W instead 10/12W with the kernel 3.6.9 !

Regards.