랩탑모드 툴 설치
$ sudo gedit /etc/laptop-mode/laptop-mode.conf
ENABLE_LAPTOP_MODE_ON_AC=1
CONTROL_NOATIME=1
CONTROL_HD_WRITECACHE=1
CONTROL_HD_WRITECACHE=1
$ sudo gedit /usr/sbin/laptop_mode
ENABLE_LAPTOP_MODE_ON_BATTERY=1
ENABLE_LAPTOP_MODE_ON_AC=1
ENABLE_LAPTOP_MODE_WHEN_LID_CLOSED=0
BATT_CPU_GOVERNOR=powersave
LM_AC_CPU_GOVERNOR=powersave
NOLM_AC_CPU_GOVERNOR=powersave