Arch Linux

Saugglocke

Member

Registered: 2018-08-06

Posts: 2

[SOLVED] L450, Kernel 4.17.12: Fan not working

Hi,

I updated to the latest linux-hardened-4.17.12.a-1-x86_64.pkg.tar.xz kernel package. After some time I recognized, that the fan isn't working any more. I'm using a Thinkpad L450. I downgraded to linux-hardened-4.17.10.a-1-x86_64.pkg.tar.xz package and it is working again.

I'm not really sure how to find out what is the actual problem. I found some evidence in journalctl. Stating: "thermal thermal_zone2: failed to read out thermal zone (-61)". Could that be related to the issue?

Output sensors:

coretemp-isa-0000
Adapter: ISA adapter
Package id 0:  +68.0°C  (high = +105.0°C, crit = +105.0°C) // Why is high equal to crit? Seems strange to me.
Core 0:        +57.0°C  (high = +105.0°C, crit = +105.0°C)
Core 1:        +68.0°C  (high = +105.0°C, crit = +105.0°C)

pch_wildcat_point-virtual-0
Adapter: Virtual device
temp1:        +52.0°C  

acpitz-virtual-0
Adapter: Virtual device
temp1:        +69.0°C  (crit = +127.0°C)

iwlwifi-virtual-0
Adapter: Virtual device
temp1:        +39.0°C  

thinkpad-isa-0000
Adapter: ISA adapter
fan1:        2808 RPM // Is 0 with 4.17.12 kernel installed

Thank you and best regards,

Matthias

Last edited by Saugglocke (2018-08-07 18:14:19)

seth

Member

From: Won't reply 2 private help req

Registered: 2012-09-03

Posts: 78,842

Re: [SOLVED] L450, Kernel 4.17.12: Fan not working

lsmod | grep thinkpad_acpi

Try thinkpad_acpi.fan_control=0 or thinkpad_acpi.fan_control=1 if the module is loaded with both kernels.

---

How to upload text · How to boot w/o GUI · Disable Windows Fast-Start! · Fix your xinitrc

Saugglocke

Member

Registered: 2018-08-06

Posts: 2

Re: [SOLVED] L450, Kernel 4.17.12: Fan not working

Hi,

just wanted to try out your mentioned steps, but after reinstalling the kernel it seems to be working fine again. Somewhat mysterious to me, not sure what was the problem. In any case thank you for your help!

Best regards,

Matthias