FreeBSD on the X24
add to /etc/rc.conf:
#enable automatic power-management with EIST (full speed on AC, load-dependent clock speed reduction on battery) powerd_enable="YES" powerd_flags="-a max -b adaptive"
add to /etc/sysctl.conf:
#place lower cpu clock speed limit for better responsiveness (powerd/cpufreq pm) debug.cpufreq.lowest=549 #make use of deep sleep CPU power state (reduced core voltage for even more power saving) hw.acpi.cpu.cx_lowest=C2
add to /boot/loader.conf:
#wlan-card and wpa-support for atheros-based 802.11-wlan cards if_ath_load="YES" wlan_tkip_load="YES" wlan_wep_load="YES" wlan_xauth_load="YES" #power management support cpufreq_load="YES" #deep sleep support hw.acpi.cpu.cx_lowest="C2" #support for ibm-extras and smbus-controller acpi_ibm_load="YES" ichsmb_load="YES"