Reading Time: 3 minutes
Since quite a long I’m issuing issues with my fan rotation controlling software on Linux.
That is really annoying since every now and then I experience problems with overheats when my systemis under heavy loads.
That would interrupt my proper work with my notebook every now and then and had became a real pain in the asswith time.
I spend a lot time looking for a solution in the meantime trying all kind of scripts which mentioned on thinkwiki.org
I’ve had an unpleasent experiences with tpfand , tp-fancontrol as well as with the automated process to control fan through some kernel module options like:
options thinkpad_acpi fan_control=1
To solve my overheating issues when the temperature shown by lm-sensors was reaching 60 degrees andabove I had to manually change the fan rotation level with the command :
# increase thinkpad fan speed to max
root@noah:~# echo level 7 > /proc/acpi/ibm/fan
The manual way to increase fan rotation when my CPU was under a high load caused by the automated thinkpad_acpi kernel module wrongly controlling the fan speed was really irritating, therefore I looked for something online to manage the fan rotation to cool my cpu in a proper way, after the many failed attems to use some of the forementioned softwares as well as other techniques I found to be explained as a workarounds to tune the automated fan rotation speed.
I finally found Thinkfan . The wonderful guys from Debian has even prepared a packaged deb package of thinkfan, so as a debian user the whole thinkfan installation was as easy as:
root@noah:~# apt-get install thinkfan
Though thinkfan worked just fine most of the time and was able to control my fan speed automatically quite properly most of the time, it failed to do so every now and then.
Since failures to adjust properly the fan rotation speed on my Debian Linux when the system was under a stress was rare, I was quite happy with thinkfan as a fan manager for my desktop linux system most of the time.
The most often cases in which thinkfan failed to properly adjust my fan speed to cool my cpu properly was after system sleeps or hibernate
To work around this issue I have created a crontab which would periodically restart the thinkfan daemon, the crontab I used is as follows:
# restart thinkfan on every 30 minutes to prevent issues with thinkfan after hibernate and sleep on Debian Linux
0,30 * * * * /etc/init.d/thinkfan restart >/dev/null 2>&1
This kind of solution worked until recently when I have used apt-get to upgrade my system software to the latest versions, ever since then thinkfan misbehaving unabling to properly control my notebook lenovo thinkpad r61 fan speed.
The failure to control properly the fan speed was accompanied by the following thinkfan warning messages in /var/log/messages :
Jun 7 15:30:02 noah thinkfan: WARNING: Using default temperature inputs in /proc/acpi/ibm/thermal.
Jun 7 15:30:02 noah thinkfan: WARNING: You have not provided any correction values for any sensor, and your fan will only start at 55 Â°C. This can be dangerous for your hard drive.
I spend almost two hours Googling for the error and possible articles on how to configure my thinkfan /etc/thinkfan.conf to match my thinkpad r61 fan control but I couldn’t find anything meaningful in Google.
Thus I started experimenting changing values in my /etc/thinkfan.conf until I reached a moment the fan is properly controlled by thinkfan.
I thought this values could be of a great benefit to other Thinkpad R61 Linux users I decided to blog about my issues and my solution to fan control issues.
So if you are also in the same struggles with properly configuring the fan speed for thinkfan to match Thinkpad model R61, you will have to download my thinkpad r61 Correction values thinkfan.conf file
Our you can either just copy paste the following in your /etc/thinkfan.conf configuration file on your system:
(0, 38, 40)
(1, 42, 44)
(2, 46, 48)
(3, 50, 52)
(4, 54, 56)
(5, 58, 60)
(6, 62, 64)
(7, 66, 32767)
For other Lenovo / IBM Thinkpad model types the correction values might be close or even it’s possible that the same configuration to control your fan with thinkfan might be compatible with other Thinkpads.
If you test it on another thinkpad and you find it working or some tweakenings to the up-mentioned correction values help in tuning thinkfan on other Thinkpads, please post here!
Thanks God, now after simply restarting my thinkfan, my notebook fan is automatically properly set to rotate!