New Linux kernel fixes power-saving issues

“Greg Kroah-Hartman has released long-term kernel 3.0.20 and
stable kernel 3.2.5. Both contain just a single bug fix that allows
PCIe power-saving technology ASPM (Active State Power Management)
to be used on systems with a BIOS that activates ASPM on some
components, but states in the FADT (Fixed ACPI Description Table)
consulted by Linux that ASPM is not supported.

According to Matthew Garrett, who developed the patch, the
change can reduce the power consumption of a Thinkpad X220 by 5

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