Use this to improve your battery performance and to maintain temperature. So here is how to install and configure TLP:
sudo add-apt-repository ppa:linrunner/tlp
sudo apt-get update
sudo apt-get install tlp tlp-rdw smartmontools ethtool
sudo apt-get install tp-smapi-dkms acpi-call-tools tlp tlp-rdw smartmontools ethtool
tlp-rdw – Radio Device Wizard - Need to enable/disable & Power saving (Wifi / Bluetooth )
smartmontools - needed by tlp-stat to display disk drive S.M.A.R.T. data
ethtool - needed to disable wake on lan
tp-smapi-dkms ThinkPad only, tp-smapi is needed for battery charge thresholds and ThinkPad specific status output of tlp-stat
acpi-call-tools ThinkPad only, acpi-call is needed for battery charge thresholds on Sandy Bridge and newer models
Removing default Ubuntu cpu frequency config
sudo update-rc.d -f ondemand remove
( This is not a general prerequisite for TLP but is only needed if the user decides to change the default governor. If a user issues the command without changing the TLP setting too, he ends up with "perfomance", which is quite bad for battery life.), Apply to section 3.) Processor and Frequency Scaling
The main config file of TLP is at /etc/default/tlp
sudo gedit /etc/default/tlp
Parameters ending on _AC are effective with the power supply connected
Parameters ending on _BAT are effective when running on battery
Parameters containing blanks must be enclosed in double quotes like this: ""
Some parameters are inactive by default; remove the leading '#' to activate
Set to 0 to disable TLP (Reboot needed), It should be enabled so leave the default value
1.) File System
DISK_IDLE_SECS_ON_BAT=2 = You can either leave the default value (2) or you can edit it as 5, By default Ubuntu uses 5, its up to you, read the gives below help
This controls how agressive the system is at trying to avoid
writing to disk. The longer the disk is idle, the more power you can save.
This is only active on battery power, and it restores these values
to kernel defaults when on AC power.
Defaults 5, which enables laptop mode and forces the system to wait
5 seconds whenever something asks to write to disk to flush out as much
data as we can.
2.) Dirty page values
Leave the default value
Defaults 60, which means that the kernel will not start forcing process
to write out file information that has been changed but not saved until 60%
of usable system memory is filled with dirty information.
3.) Processor and Frequency Scaling
Remove the hash and edit it as conservative.
Its up to you what you want, you can also use ON_BAT=powersave
Select a cpu frequency scaling governor: ondemand/powersave/performance/conservative
The governor decides what frequency should be used.
ondemand Dynamically switch between CPU(s) available if at 95% cpu load
performance Run the cpu at max frequency
conservative Dynamically switch between CPU(s) available if at 75% load
powersave Run the cpu at the minimum frequency
To use "conservative" over "powersave – especially on AC – should not be
a general recommendation but only an option for hardware that produces
excessive heat or fan noise.
4.) Min/Max frequency
Set the min/max frequency available for the scaling governor.
Possible values strongly depend on your cpu. For available frequencies see
tlp-stat output, Section "+++ Processor".
Hint: Parameters are disabled by default, remove the leading # to enable them,
otherwise kernel default values are used.
5.) Turbo Boost
Set the cpu "turbo boost" feature: 0=disable / 1=allow ,Requires an Intel Core i processor and kernel 3.7 or later.
This may conflict with your distribution's governor settings, A value of 1 does not activate boosting, it just allows it
6.) Cpu Cores/Hyper-Threads
Minimize number of used cpu cores/hyper-threads under light load conditions
Activate kernel NMI watchdog timer (0 = disabled/save power, 1=enabled). A value of 1 is relevant for kernel debugging only.
8.) Hard disk advanced power management level
Set the "Advanced Power Management Level". Possible values range between 1 and 255:
1 – max power saving / minimum performance
Important: this setting may lead to increased disk drive wear and tear because of excessive read-write head unloading (recognizable from the clicking noises)
128 – compromise between power saving and wear (TLP standard setting on battery)
192 – prevents excessive head unloading of some HDDs
254 – minimum power saving / max performance (TLP standard setting on ac)
255 – disable APM (not supported by some disk models)
Different values for multiple disks are separated with blanks.
9.) Disk I/O Scheduler
Select io scheduler for the disk devices: noop/deadline/cfq (Default: cfq)
Separate values for multiple devices with spaces.
noop is often the best choice for memory-backed block devices (e.g. ramdisks) and other non-rotational media (flash) where trying to reschedule I/O is a waste of resources
deadline is a lightweight scheduler which tries to put a hard limit on latency
cfq tries to maintain system-wide fairness of I/O bandwidth
10.) SATA aggressive link power management (ALPM):
Aggressive Link Power Management (ALPM) is a mechanism where a SATA AHCI controller can put the SATA link that connects to the disk into a very low power mode during periods of zero I/O activity and into an active power state when work needs to be done. Tests show that this can save around 0.5-1.5 Watts of power on a typical system. ( For more check " Sources and additional help " )
11.) PCI Express Active State Power Management (PCIe ASPM):
( default/performance/powersave )
Hint: needs kernel boot option pcie_aspm=force on some machines
12.) Radeon graphics clock speed
(profile method): low/mid/high/auto/default
auto = mid on BAT, high on AC; default = use hardware defaults (Kernel >= 2.6.35 only, not with fglrx driver!)
13.) WiFi power saving mode
(Linux 2.6.32 and later, some adapters only!)
14.) Disable wake on lan
Y = Yes , N = No
15.) Audio power saving for Intel HDA
Enable audio power saving for Intel HDA, AC97 devices (timeout in secs). A value of 0 disables / >=1 enables power save.
Disable controller too (HDA only): Y/N
16.) Power off optical drive in UltraBay >> (ThinkPads only)
Set to 1 to power off optical drive in UltraBay (ThinkPads only), when running on battery. A value of 0 disables this Feature (Default). Drive can be powered on again by releasing (and reinserting) the eject lever or by pressing the disc eject button on newer models. Note: an UltraBay hard disk is never powered off.
Optical drive device to power off (default sr0)
17.) Runtime Power Management for pci(e) bus devices
Runtime PM for all pci(e) bus devices
Runtime PM for all pci(e) bus devices: 0=disable / 1=enable, Warning: experimental option, could cause system instabilities
Some times my usb mouse dongle didn't work when i plug it in usb 3 port, work fine when i plug it in usb 2 port, and all my usb 3 devices are working properly no issue.
18.) Usb autosuspend
Set to 0 to disable/1 to enable usb autosuspend feature
19.) System Start and Shutdown
Restores radio device state (builtin bluetooth, wifi, wwan) from previous shutdown on system startup:
0 – disable, 1 – enable
DEVICES_TO_DISABLE_ON_STARTUP="bluetooth wifi wwan"
Disables builtin radio devices upon system start:
wifi – Wireless LAN
wwan – Wireless Wide Area Network (UMTS)
Multiple devices are separated with blanks.
I have an error that my Blue tooth device is not Disabled on start up, so if you face this problem just do the following config
sudo nano /etc/rc.local
And add the following line before exit 0
rfkill block bluetooth
Save & Exit & Reboot
Working with TLP
After installation TLP will be automatically activated upon system start.
To start it immediately without reboot or to apply changed settings use:
sudo tlp start
Use the tlp-stat terminal command to check if TLP is working properly
Check You system temperature
sudo tlp-stat -t
Show battery information only:
sudo tlp-stat -b
sudo tlp-stat --battery
Show configuration only:
Show radio devices switch state only:
Show temperatures and fan speed only:
Apply Battery Settings (ignoring the actual power source):
sudo tlp bat
Apply AC Settings (ignoring the actual power source):
sudo tlp ac
You can check Which I/O you are using.
sudo tlp-stat # Check the section +++ Storage Devices
To examine suspected problems in TLP more closely, activate trace mode in /etc/default/tlp:
TLP_DEBUG="lock nm path pm rf run sysfs udev usb"
Add above mentioned line in the end /etc/default/tlp , The accumulated trace data may be read at any time with
grep "tlp" /var/log/debug
In case the trace output is missing, you have to modify your rsyslogd configuration. Create the file
And restart the daemon
sudo /etc/init.d/rsyslog restart
Sources and additional help
There is very good support at TLP Website
Useful Config Link 1
Tweak your CPU frequency with
indicator-cpufreq will help you change your CPU frequency on the go:
sudo apt-get install indicator-cpufreq
Go to Dash > search for Startup > edit
-f or copy paste the following command:
With the indicator you will be able to monitor your current CPU frequency & can change CPU frequency
Changing CPU frequency
Click on indicator
sudo nano /etc/default/grub
GRUB_CMDLINE_LINUX_DEFAULT="quiet splash i915.lvds_downclock=1 drm.vblankoffdelay=1"
Reboot to apply the changes. You do not need other tweaks as they are already added by defaults.
Regularly discharging the battery
Discharge the battery atleast twice a week.
I have been using Dell utility in windows and it shows my battery health to be 94%. I had 76% before because I was not discharging it. Now that I am discharging it twice a week it's at 94% and I get almost 5 hours of battery life.
Battery discharges Read before discharging the battery
VA-API (Hardware Acceleration For Intel / AMD GPUs)
I have tested VA-API Hardware Acceleration in Ubuntu 13.04 and it save around 2 to 4 watts of battery and save cpu usage when playing movies, I would recommend it because it has no downside.
The main motivation for VA-API (Video Acceleration API) is to enable hardware accelerated video decode/encode at various entry-points (VLD, IDCT, Motion Compensation etc.) for the prevailing coding standards today (MPEG-2, MPEG-4 ASP/H.263, MPEG-4 AVC/H.264, and VC-1/VMW3). Extending XvMC was considered, but due to its original design for MPEG-2 MotionComp only, it made more sense to design an interface from scratch that can fully expose the video decode capabilities in today's GPUs.
Help full Links
Official Intel Drivers are using VA-API
Support video codecs
Install Intel / AMD VA-API drivers in Ubuntu
for Intel GPUs (for Intel HD Graphics as well as G45 and later):
sudo apt-get install i965-va-driver libva-intel-vaapi-driver vainfo
for AMD Radeon GPUs (you also need the proprietary drivers!):
sudo apt-get install xvba-va-driver vainfo
Install MPlayer with VA-API support in Ubuntu
By default, the MPlayer version available in the official Ubuntu repositories doesn't support VA-API, but you can use a PPA which provides custom MPlayer builds with VA-API support.
sudo add-apt-repository ppa:sander-vangrieken/vaapi
sudo apt-get update
sudo apt-get install mplayer-vaapi
Now you need to install smplayer or vlc
sudo add-apt-repository ppa:rvm/smplayer
sudo apt-get update
sudo apt-get install smplayer
sudo apt-get install vlc vlc-plugin-pulse mozilla-plugin-vlc
Its in Option tab > Preferences, on the Video tab > General Video > Output driver set the video output driver to "vaapi":
Its in Tools > Preferences > Input & Codecs > Enable Use GPU Accelerated decoding
How to correctly enable/test VA-API on Intel Sandy Bridge?
Command line flag for mplayer to use hardware acceleration?
PowerSavingTweaks for Intel Graphics
sudo nano /etc/default/grub
GRUB_CMDLINE_LINUX_DEFAULT=""quiet splash pcie_aspm=force i915.lvds_downclock=1 drm.vblankoffdelay=1 i915.semaphores=1"
Added 2 new options
1 = pcie_aspm=force , 2 = i915.semaphores=1
As the test results shows it save around 0.75 to 1 watts of battery
9.40 Watts on Average
8.56 Watts on Average
I will try to update more test results, This update is still in beta process, i have tested only twice, please share your results also.
3x+ battery life
If you google i915.semaphores=1 & i915.semaphores=1 battery save you will find very good links