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fenrus75 / powertop

The Linux PowerTOP tool -- please post patches to the mailing list instead of using github pull requests
http://www.01.org/powertop
GNU General Public License v2.0
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How to read powertop output? It says my device usage is 100% #105

Open yurii-anikin opened 2 years ago

yurii-anikin commented 2 years ago

Hello. First of all I am sorry for silly name of the issue.

My issue is that powertop shows that my built-in fingerprint reader usage is 100% and that is scary

image Does it mean that my built-in fingerprint reader (USB device: usb-device-06cb-00fc) takes ... 100% of power? How to read that? I am sorry I am little bit stressed cause my thinkpad is very hot during just regular browser surfing....

another screenshot from powertop: image

fenrus75 commented 2 years ago

it means that this device does not participate in any power saving and also (as a USB device that is active) will keep your CPU from using its lowest power modes

On Thu, Aug 4, 2022, 05:17 yurii-anikin @.***> wrote:

Hello. First of all I am sorry for silly name of the issue.

My issue is that powertop shows that my built-in fingerprint reader usage is 100% and that is scary

[image: image] https://user-images.githubusercontent.com/109966673/182844335-ac056e83-3643-441c-9845-b17b865b8883.png Does it mean that my built-in fingerprint reader (USB device: usb-device-06cb-00fc) takes ... 100% of power? How to read that? I am sorry I am little bit stressed cause my thinkpad is very hot during just regular browser surfing....

another screenshot from powertop: [image: image] https://user-images.githubusercontent.com/109966673/182844669-3bf21e8c-7b12-408e-8271-89e47e4dcc27.png

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nikitosiusis commented 2 years ago

And what can cause this behaviour?

fenrus75 commented 2 years ago

most likely there is a piece of software on your system that keeps the fingerprint device open and busy.....

On Tue, Aug 9, 2022 at 10:12 AM nikitosiusis @.***> wrote:

And what can cause this behaviour?

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nikitosiusis commented 2 years ago

Yes, I understand this, but where should I look into, to debug which one is doing this?:)

yurii-anikin commented 2 years ago

@fenrus75 thanks for answers. I googled more and found advices from thinkpad users who are disabling fingerprint reader in bios, as well as other stuff like LAN port, WAN port(i dont have then physically, but they were in bios). So did I.

But now I have other problem: image Does it really means that my integrated webcamera dosn't participate in any power saving protocols? How can it be (

fenrus75 commented 2 years ago

if you have the "lsof" tool, it often is useful in finding which things keep what files open, you'll be looking for something keep usb devices or input devices open

On Tue, Aug 9, 2022 at 10:35 AM nikitosiusis @.***> wrote:

Yes, I understand this, but where should I look into, to debug which one is doing this?:)

— Reply to this email directly, view it on GitHub https://github.com/fenrus75/powertop/issues/105#issuecomment-1209670028, or unsubscribe https://github.com/notifications/unsubscribe-auth/AAJ54FOHLHEW3R63B723PDLVYKJHFANCNFSM55SKQC6A . You are receiving this because you commented.Message ID: @.***>