Reducing power consumption of Intel chipset

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http://askubuntu.com – I've just installed Xubuntu on my Samsung 530U (SSD version) and everything works find, but the battery life is dramatically lower comparing to Win7. Full battery is able to work about ten hours (lowest brightness, wifi/BT turned off, just typing in texworks), but using Xubuntu I get max about 7 hours. I guess I know, where is the problem, here is my list from powertop: Bad Enable SATA link power management for /dev/sda Bad Runtime PM for PCI Device ASMedia Technology Inc. ASM1042 SuperSpeed USB Host Controller Bad Runtime PM for PCI Device Intel Corporation (HowTos)