How to Improve Power Management in Zenbook UX303UA?

Situation: to improve the power management of the zenbook when I need computation power, especially when the zenbook is in AC I am experimenting about 3 hour battery life without any computation, without any firmware failures/issues and just typing in Stackexchange network in my new UX303UA. Expected battery time is up to 7 hours, here its Asus website. Arch Linux wiki confirms in the same series ultrabook > Battery has a design capacity of 4429mAh, and is able to provide just over 3 hours of autonomy under normal circumstances (average load of around 0.3 and WiFi enabled, brightness lowered to mid-range) without serious power saving tweaks. - - ACPI tools are able to correctly detect the battery state. They recommend Laptop mode tools , which I will be testing 1. apt-get install laptop-mode-tools 2. Enable laptop-mode.service, where the following command should return 2 cat /proc/sys/vm/laptop_mode 3. Actually, I do not understand why they propose to change to the laptop mode to 1 where I would like to keep 0 when in AC because I need power in computations # http://askubuntu.com/questions/180712/how-to-enable-laptop-mode # edit /etc/laptop-mode/laptop-mode.conf` ENABLE_LAPTOP_MODE_ON_AC=1 # where I want to have zero. Why they propose 1? 4. Restart laptop-mode as root by /etc/init.d/laptop-mode restart Default power saving states found by grep -command root@masi:/home/masi# grep -r '^\(CONTROL\|ENABLE\)_' /etc/laptop-mode/conf.d/etc/laptop-mode/conf.d/intel-sata-powermgmt.conf:CONTROL_INTEL_SATA_POWER="auto" /etc/laptop-mode/conf.d/radeon-dpm.conf:CONTROL_RADEON_DPM="auto" /etc/laptop-mode/conf.d/sched-smt-power-savings.conf:CONTROL_SCHED_SMT_POWER_SAVINGS="auto" /etc/laptop-mode/conf.d/start-stop-programs.conf:CONTROL_START_STOP=1 /etc/laptop-mode/conf.d/wireless-power.conf:CONTROL_WIRELESS_POWER_SAVING="auto" /etc/laptop-mode/conf.d/intel_pstate.conf:CONTROL_INTEL_PSTATE="auto" /etc/laptop-mode/conf.d/dpms-standby.conf:CONTROL_DPMS_STANDBY="auto" /etc/laptop-mode/conf.d/nmi-watchdog.conf:CONTROL_NMI_WATCHDOG="auto" /etc/laptop-mode/conf.d/sched-mc-power-savings.conf:CONTROL_SCHED_MC_POWER_SAVINGS="auto" /etc/laptop-mode/conf.d/intel-hda-powersave.conf:CONTROL_INTEL_HDA_POWER="auto" /etc/laptop-mode/conf.d/pcie-aspm.conf:CONTROL_PCIE_ASPM="auto" /etc/laptop-mode/conf.d/auto-hibernate.conf:ENABLE_AUTO_HIBERNATION=0 /etc/laptop-mode/conf.d/wireless-iwl-power.conf:CONTROL_IWL_POWER="auto" /etc/laptop-mode/conf.d/exec-commands.conf:CONTROL_EXEC_COMMANDS="auto" /etc/laptop-mode/conf.d/hal-polling.conf:CONTROL_HAL_POLLING="auto" /etc/laptop-mode/conf.d/ethernet.conf:CONTROL_ETHERNET="auto" /etc/laptop-mode/conf.d/runtime-pm.conf:CONTROL_RUNTIME_AUTOSUSPEND=1 /etc/laptop-mode/conf.d/configuration-file-control.conf:CONTROL_CONFIG_FILES=0 /etc/laptop-mode/conf.d/ac97-powersave.conf:CONTROL_AC97_POWER="auto" /etc/laptop-mode/conf.d/eee-superhe.conf:CONTROL_SUPERHE="auto" /etc/laptop-mode/conf.d/lcd-brightness.conf:CONTROL_BRIGHTNESS=0 /etc/laptop-mode/conf.d/terminal-blanking.conf:CONTROL_TERMINAL="auto" /etc/laptop-mode/conf.d/bluetooth.conf:CONTROL_BLUETOOTH=0 /etc/laptop-mode/conf.d/cpufreq.conf:CONTROL_CPU_FREQUENCY="auto" /etc/laptop-mode/conf.d/cpufreq.conf:CONTROL_CPU_THROTTLING=0 /etc/laptop-mode/conf.d/wireless-ipw-power.conf:CONTROL_IPW_POWER="auto" /etc/laptop-mode/conf.d/video-out.conf:CONTROL_VIDEO_OUTPUTS=0 /etc/laptop-mode/conf.d/battery-level-polling.conf:ENABLE_BATTERY_LEVEL_POLLING=0 I am not sure which files are relevant in the power management in the directory etc/laptop-mode/conf.d/, etc many authors ignore ac97-powersave.conf - - why? Iterating GAD3R's answer --- Installing the package (apt-get install laptop-mode-tools), rebooting and having just the default power options leads to significant increase in battery time. The 25% of battery is now about 2h 15 minutes -use so 100% of battery is about 10 hours of use i.e. about 3.5 times more battery time. There are only a few options off in the settings' file where I cannot find anything relevant to turn on root@masi:/home/masi# grep =0 /etc/laptop-mode/laptop-mode.conf # CONTROL_something=0/1 Determines whether Laptop Mode Tools controls VERBOSE_OUTPUT=0 DEBUG=0 ENABLE_LAPTOP_MODE_ON_AC=0 ENABLE_LAPTOP_MODE_WHEN_LID_CLOSED=0 DISABLE_BATTERY_ALARM_CHECK=0 CONTROL_NOATIME=0 CONTROL_HD_WRITECACHE=0 NOLM_BATT_HD_WRITECACHE=0 LM_HD_WRITECACHE=0 I do not want to change defaults much. Which settings would you change to accomplish the significant improvement in the power management? Hardware: Asus Zenbook UX303UA OS: Debian 8.5 64 bit Firmwares: updated and/or installed as described in the thread How Smooth is Upgrading Linux kernel in Debian 8.5? Linux kernel: 4.6 of backports Related: ASUS Zenbook UX303 in Arch Linux Other Asus Zenbooks of 2nd gen: UX301LA