High fan speed after suspend

Question

It seems this is a common problem, but I still cannot find a good solution. After a cold boot, my laptop runs perfectly, but after resuming from suspend, the fan kicks in to 100% and blows out cold air, indicating that the fan isn't responding to the temperature of the laptop components. As proof, here's the output from sensors:

acpitz-virtual-0
Adapter: Virtual device
temp1:        +41.0°C  (crit = +101.0°C)

coretemp-isa-0000
Adapter: ISA adapter
Physical id 0:  +43.0°C  (high = +87.0°C, crit = +105.0°C)
Core 0:         +43.0°C  (high = +87.0°C, crit = +105.0°C)
Core 1:         +39.0°C  (high = +87.0°C, crit = +105.0°C)

My laptop model is Sony SVE14A290X. I have tried adding a couple different 99fancontrol.d scripts, but none worked so far. pwmconfig also doesn't report a pwm-capable module in my laptop. Please help!

Solution

Unfortunately fancontrol doesn't restore the fan state after suspension. You can write a pm-action(8) resume hook that restarts the fancontrol service:

1. Create a file /etc/pm/sleep.d/10_fancontrol (e. g. with gksudo gedit):

   #!/bin/sh
   case "$1" in
   resume)
       exec service fancontrol restart;;
   esac
   

2. Mark it executable:

   sudo chmod +x /etc/pm/sleep.d/10_fancontrol
   

Comments

[Elder Geek]

Related: askubuntu.com/questions/58404/how-to-start-and-stop-a-servic‌​e

[David Foerster]

As you're a reputation 1 user: if this answers your question, don't forget to click the grey ☑ under the "0" at the left of this text to accept it, which means "yes, this answer is valid"!

[jarno]

fancontrol is not even installed by default (at least in Xubuntu 15.10).

[DanMan]

I don't think it worked.

[fisk]

Worked for me. May need to mark it executable

[Benjamin]

This was from another question, but it seems like there was some sort of bug that got fixed in kernel 4.12. If you follow this guide to manually installed the latest kernel (via .debs) this will fix the problem. tecmint.com/upgrade-kernel-in-ubuntu