Ubuntu
acpi package

Fan won't spin down on T420 after an Ubuntu update, 11.10

Asked by jkbkot

I installed an update yesterday, and since then the fan on my T420 started spinning at the highest speed all the time.

I see that the two/three last updates included acpid and linux-image-generic.

Does this qualify for a bug report? I'm not sure how to debug it myself. Perhaps I could try to boot a previous kernel...

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actionparsnip (andrew-woodhead666) said : 		#1

Try:

echo "options thinkpad_acpi fan_control=1" | sudo tee /etc/modprobe.d/thinkpad_acpi.conf

Reboot to test

Source:
http://forum.notebookreview.com/lenovo-ibm/572680-t420-fan-runs-all-time-ubuntu-11-04beta2.html

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jkbkot (jkbkot) said : 		#2

No, unfortunately it didn't help..

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actionparsnip (andrew-woodhead666) said : 		#3

ok, delete the file, you can run:

ubuntu-bug acpi

And report a bug, also make sure you have the latest BIOS

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jkbkot (jkbkot) said : 		#4

thanks, I did as you suggested: https://bugs.launchpad.net/ubuntu/+source/acpi/+bug/905406