Hardware Issue: Unable to get fans to turn on which is causing my laptop to overheat, fan_mode set to 0

[Devin Stagner]

Hello Community,

I have been trying to solve the issue of my fans not turning on and my laptop sustaining quite hot temperatures.

My computer is a Lenovo Yoga 920

I have tried:
     Installed and configured thinkfan following these instructions
     Sensors do not show any fans that I can find

     I searched the computer for fans using
          find /sys/devices -type f -name "*fan*"
          which gives me
         /sys/devices/pci0000:00/oooo?00:lf.0/PNP0C09:00/VPC2004:00/fan_mode

     I found that fan_mode is either 0 for manual or 1 for automatic fan control. I thought that since I have been unsuccessful with setting manual fan control that I could perhaps change it to automatic, but when I edit the file to 1, it doesn't do anything and rebooting resets it back to 0.

Perhaps someone can inform me if I am going about this the right way or suggest another way to get the fans working on my laptop?

Thank you,

Devin Stagner

[awokd]

On Sat, August 18, 2018 2:28 pm, Devin Stagner wrote:
> Hello Community,
>
>
> I have been trying to solve the issue of my fans not turning on and my
> laptop sustaining quite hot temperatures.
>
> My computer is a Lenovo Yoga 920
>
>
> I have tried:
> Installed and configured thinkfan following these instructions

> <https://wiki.loopback.org/display/KB/Mitigate+annoying+fan+noise+on+Tink
> pad+running+Qubes+OS> Sensors do not show any fans that I can find

>
>
> I searched the computer for fans using
> find /sys/devices -type f -name "*fan*" which gives me
> /sys/devices/pci0000:00/oooo?00:lf.0/PNP0C09:00/VPC2004:00/fan_mode
>
>
> I found that fan_mode is either 0 for manual or 1 for automatic fan
> control. I thought that since I have been unsuccessful with setting
> manual fan control that I could perhaps change it to automatic, but when
> I edit the file to 1, it doesn't do anything and rebooting resets it back
> to 0.
>
> Perhaps someone can inform me if I am going about this the right way or
> suggest another way to get the fans working on my laptop?

Firmware update? Check the UEFI config too; might be a way to set fan
mode/speed. Usually expect fans to be controlled by the embedded
controller if the OS doesn't pick them up. Could maybe also temporarily
try booting it with a recent Debian and see if that handles the fans any
better, might give an idea where to look in Qubes/Xen.