I have a Lenovo Thinkpad w541 with Haswell Procesor (i7-4810MQ ). I am unable to load the a Thinkpad module for battery improvement.

joselugo@joselugo:~$ sudo tlp-stat -b --- TLP 0.7 --------------------------------------------

+++ ThinkPad Extended Battery Functions tp-smapi = inactive (kernel module 'tp_smapi' load error)<<<<<<<<<<

tpacpi-bat = active

+++ ThinkPad Battery Status: BAT0 (Main / Internal) /sys/class/power_supply/BAT0/manufacturer = SMP /sys/class/power_supply/BAT0/model_name = 45N1149 /sys/class/power_supply/BAT0/cycle_count = (not supported) /sys/class/power_supply/BAT0/energy_full_design = 56160 [mWh] /sys/class/power_supply/BAT0/energy_full = 56040 [mWh] /sys/class/power_supply/BAT0/energy_now = 55950 [mWh] /sys/class/power_supply/BAT0/power_now = 0 [mW] /sys/class/power_supply/BAT0/status = Unknown

tpacpi-bat.BAT0.startThreshold = 96 [%] tpacpi-bat.BAT0.stopThreshold = 100 [%] tpacpi-bat.BAT0.forceDischarge = 0

I read this: If you are installing on a recent Thinkpad that has an Ivy Bridge or newer processor (X230, T430, T530, etc.), tp_smapi will not work. You will be mostly limited to thinkpad-acpi capabilities. You can however set battery charge thresholds with tpacpi-bat.

Here: http://www.thinkwiki.org/wiki/Tp_smapi#Installation_on_Ubuntu

Can anyone confirm if the Thinkpad w541 falls on this category?

I am having terrible battery performance, I have installed powertop, tdp, thinkpad modules, THERMALD AND INTEL P-STATE. I am not seeing to much difference since I have installed/uninstalled them and combining them without much success. I would love to hear the comments from someone having the same laptop and seeing their results with their battery performance.

Thanks in advance,


tp-smapi doesn't support your hardware. Your output shows that tpacpi-bat works. Try to recalibrate your battery as described in the manual.

EDITH: i had a closer look into your output. Your battery doesn't need recalibration (design cap 0 56040 mAh vs. last full = 55950 mAh).

So i guess the reason for your fast battery drain is something else, probably the infamous Nvidia Optimus hybrid graphics.

|improve this answer|||||
  • Thanks for your response. Unfortunately I had to remove Ubuntu because of this issue. Your pointer about Nvidia graphics seem interesting. Do you have any link regarding this issue so I can check it and try to reinstall Ubuntu on a second SSD? This laptop has an extra bay and probably I can try that without disrupting my current "forced" Windows environment. I would like to understand the issue and the workaround. The only thing that I regarding that front was to install the official Nvidia driver and set it to Intel only. – luismoondo Jul 14 '15 at 22:29

You could try laptop-mode instead. This page is useful for installation on Ubuntu 15.10

|improve this answer|||||

Your Answer

By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy

Not the answer you're looking for? Browse other questions tagged or ask your own question.