Gentoo Forums
Gentoo Forums
Gentoo Forums
Quick Search: in
thinkpad_acpi High Power Consumption
View unanswered posts
View posts from last 24 hours

 
Reply to topic    Gentoo Forums Forum Index Kernel & Hardware
View previous topic :: View next topic  
Author Message
grellyd
n00b
n00b


Joined: 11 Oct 2016
Posts: 21

PostPosted: Tue Oct 11, 2016 10:58 pm    Post subject: thinkpad_acpi High Power Consumption Reply with quote

Hi all,

After seeing this lovely 7.6W post on reddit, I checked out my power usage. Currently thinkpad_acpi, the driver to thinkpad specific features, is consuming a strange amount of power! 6.10W / 6.61W in this image example

The next power hungry thing is the bluetooth usb device, which I have just disabled in the kernel. However that is a difference of at least an order of magnitude!

Why is thinkpad_acpi consuming so much power? Additionally, how can I troubleshoot what is going on/wrong?

Per kernel.org, thinkpad_acpi only adds access to:

  • Fn key combinations
  • Bluetooth enable and disable
  • video output switching, expansion control
  • ThinkLight on and off
  • CMOS/UCMS control
  • LED control
  • ACPI sounds
  • temperature sensors
  • Experimental: embedded controller register dump
  • LCD brightness control
  • Volume control
  • Fan control and monitoring: fan speed, fan enable/disable
  • WAN enable and disable
  • UWB enable and disable

I see no reason why any of those would cause ~6W of power use...

Notably, my battery life took a large drop recently. My suspicion is that when I did recent emerge --sync and then package update, something was different after recompilation. However I am not sure how to troubleshoot that. My current approach is figure out why thinkpad_acpi is consuming so much more power, and then figure out what package changed caused it.

Any help you guys could provide would be fantastic!

Thanks,

--grellyd
Gentoo 4.4.6 || T440s
Back to top
View user's profile Send private message
albright
Advocate
Advocate


Joined: 16 Nov 2003
Posts: 2541
Location: Near Toronto

PostPosted: Wed Oct 12, 2016 12:17 pm    Post subject: Reply with quote

I find that powertop is very inaccurate about particular device
power usage FWIW
_________________
.... there is nothing - absolutely nothing - half so much worth
doing as simply messing about with Linux ...
(apologies to Kenneth Graeme)
Back to top
View user's profile Send private message
Display posts from previous:   
Reply to topic    Gentoo Forums Forum Index Kernel & Hardware All times are GMT
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum