Phoronix reports more Linux power issues, you can read it over here.
"If you were hoping that the Linux 3.1 kernel would fix the big
power regression problem that's caused by PCI Express Active State Power
Management (ASPM) being disabled on more systems since the release of
the Linux 2.6.38 kernel, you're not in luck. There has not been any
active work in this area. Making things worse though for mobile Linux
users interested in a long lasting battery is another new regression in
the Linux 3.1 kernel. Affected systems can easily see a 30% increase in
power consumption simply when comparing the Linux 3.0 kernel to the
current code being assembled for Linux 3.1. For an Intel Sandy Bridge
notebook, the power consumption is up by 76% just over the course of
this year from Linux kernel regressions."