[Solved] Fan level auto sets speed to 0 even under heavy load

Erik_Norell · 2015-10-09 08:02:40

I have a Thinkpad T440s laptop and was working yesterday when I suddenly noticed the cpu-temperatures at 90-95 degrees. It was under load so high temperature was not a surprise, although I have never seen temperatures over 75 degrees. Then I noticed the cpu fan was not spinning. First thought it had failed but after reboot it started. Now it's at 0 even after reboot.

I have enabled fan_control=1 for the thinkpad_acpi module and enabled manual control through pwm1_enable. This allows me to set the level using /proc/acpi/ibm/fan. So it works at least. Setting it back to auto results in a steady 0 RPM. This only happended yesterday, everything has worked before? It showed up after an update yesterday and a wakeup from sleep after that.

Anyone with a similar problem? Any idea how to troubleshoot this? Shoud I switch to a manual profile like this: https://wiki.archlinux.org/index.php/Fan_speed_control

I would prefer auto working, it did what it was supposed to do.

Thanks for any help!
/Erik

Edit: Sort of solved. It's a hardware issue with some sensors not waking up after sleep. It seems to happen after wake up AND being plugged in. Sending it to sleep and waking it up while on battery seems to wake the sensors/fan up again. If this solution is not good enough for you, you are urged to contact Lenovo. See this thread for more info: https://forums.lenovo.com/t5/ThinkPad-T … 991/page/4

Last edited by Erik_Norell (2015-10-27 20:39:11)

Erik_Norell · 2015-10-09 08:13:07

Sorry, just saw now that maybe this should be under laptop issues. Maybe some moderator can move it?

Thanks!

cycling_penguin · 2015-10-12 12:24:06

Can confirm this on a X240. High load causes temperatures to rise for cores 0 and 1 to mid-90s, but fan remains silent. When booting with high temperatures though, fan works as a charm. Just noticed yesterday, so I can't say which update may have caused that. Any ideas how to follow up on this?

Fan not working, lm_sensors' coretemp-isa-0000 reads 60°C, Thermal 0 just 48°C

$ acpi -V                                                                                                       
Battery 0: Full, 100%
Battery 0: design capacity 3848 mAh, last full capacity 3513 mAh = 91%
Battery 1: Full, 100%
Battery 1: design capacity 1881 mAh, last full capacity 1748 mAh = 92%
Adapter 0: on-line
Thermal 0: ok, 48.0 degrees C
Thermal 0: trip point 0 switches to mode critical at temperature 200.0 degrees C
Cooling 0: x86_pkg_temp no state information available
Cooling 1: intel_powerclamp no state information available
Cooling 2: Processor 0 of 10
Cooling 3: Processor 0 of 10
Cooling 4: Processor 0 of 10
Cooling 5: Processor 0 of 10

Fan working (after 'hot' boot), lm_sensors' coretemp-isa-0000 reads 60°C, as well as Thermal 0

$ acpi -V                                                                                                       
Battery 0: Full, 100%
Battery 0: design capacity 3848 mAh, last full capacity 3513 mAh = 91%
Battery 1: Full, 100%
Battery 1: design capacity 1881 mAh, last full capacity 1748 mAh = 92%
Adapter 0: on-line
Thermal 0: ok, 60.0 degrees C
Thermal 0: trip point 0 switches to mode critical at temperature 200.0 degrees C
Cooling 0: x86_pkg_temp no state information available
Cooling 1: intel_powerclamp no state information available
Cooling 2: Processor 0 of 10
Cooling 3: Processor 0 of 10
Cooling 4: Processor 0 of 10
Cooling 5: Processor 0 of 10

Best,
hannes

Last edited by cycling_penguin (2015-10-12 12:47:43)

nail · 2015-10-12 13:27:56

Check BIOS for CPU settings like Performance(Max performance) and Battery Life(Max Battery Life).
I set to Battery Life.
Before i have the same:
"...I suddenly noticed the cpu-temperatures at 90-95 degrees. ..."
Now under medium-high load(firefox-youtube, virtualbox, vlc ) - cpu-temperatures less than 65-75 degrees.
Also i don't use THERMALD.

Maybe it will be helpful.

PS:Firstly if something working not as previously:
"Downgrade kernel" )
- and compare it.

cycling_penguin · 2015-10-12 16:39:26

Thanks for the hint. Did not change any BIOS settings, so something else must be the culprit. No difference between linux 4.1.10-2 (lts), 4.2.2-1, and 4.3rc4-1 (mainline), fan is not working when CPU temp is normal during boot

Erik_Norell · 2015-10-27 20:42:31

cycling_penguin wrote:

Thanks for the hint. Did not change any BIOS settings, so something else must be the culprit. No difference between linux 4.1.10-2 (lts), 4.2.2-1, and 4.3rc4-1 (mainline), fan is not working when CPU temp is normal during boot

Don't know if this is still of interest to you? Turns out my problem is hardware related, maybe it applies to the X240 as well? It seems to happen after sleep AND being plugged in. Sending it to sleep and waking it up while on battery seems to wake the sensors/fan up again. For more info: https://forums.lenovo.com/t5/ThinkPad-T … 991/page/4

Arch Linux

#1 2015-10-09 08:02:40

[Solved] Fan level auto sets speed to 0 even under heavy load

#2 2015-10-09 08:13:07

Re: [Solved] Fan level auto sets speed to 0 even under heavy load

#3 2015-10-12 12:24:06

Re: [Solved] Fan level auto sets speed to 0 even under heavy load

#4 2015-10-12 13:27:56

Re: [Solved] Fan level auto sets speed to 0 even under heavy load

#5 2015-10-12 16:39:26

Re: [Solved] Fan level auto sets speed to 0 even under heavy load

#6 2015-10-27 20:42:31

Re: [Solved] Fan level auto sets speed to 0 even under heavy load

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