On my machine CPU offline: echo 0 > /sys/devices/system/cpu/cpu<num>/online CPU online: echo 1 > /sys/devices/system/cpu/cpu<num>/online works fine with 3.13-rc3. Regards Martin -- To unsubscribe from this list: send the line "unsubscribe cpufreq" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html