These are my energy tweaks for a 2008 MacBook, I don't have my x220 here, although they are machine independent: echo 5 > /proc/sys/vm/laptop_mode echo 1500 >

These are my energy tweaks for a 2008 MacBook, I don't have my x220 here, although they are machine independent: echo 5 > /proc/sys/vm/laptop_mode echo 1500 > /proc/sys/vm/dirty_writeback_centisecs echo 0 > /proc/sys/kernel/nmi_watchdog echo 1 > /sys/module/snd_hda_intel/parameters/power_save for i in /sys/bus//devices//power/control; do echo auto > $i; done for i in /sys/class/scsi_host//link_power_management_policy; do echo min_power > $i; done for i in /sys/class/rfkill//soft; do echo 1 > $i; done For the kernel parameters, a simple Google search should get you going. What's the watt consumption you achieve? I must note I run Arch Linux with Xmonad and no desktop environment.