How to start the processor fan early to avoid high temperatures.
For some strange reason, in recent days my laptop’s processor is getting too hot and the fan takes a long time to start to lower the temperature.
I don’t have time to investigate why. The laptop is a Lenovo X240 with Arch, I have done the following:
~$ sudo -i ~# sensors
It returns this:
Adapter: ISA adapter Package id 0: +69.0°C (high = +100.0°C, crit = +100.0°C) Core 0: +64.0°C (high = +100.0°C, crit = +100.0°C) Core 1: +69.0°C (high = +100.0°C, crit = +100.0°C) acpitz-acpi-0 Adapter: ACPI interface temp1: +62.0°C (crit = +200.0°C) thinkpad-isa-0000 Adapter: ISA adapter fan1: 0 RPM temp1: +62.0°C temp2: +0.0°C temp3: +0.0°C temp4: +0.0°C temp5: +0.0°C temp6: +0.0°C temp7: +0.0°C temp8: +0.0°C
High temperature equal to critical temperature? 100°C… To boil water!
I install the package
thinkfan (from AUR). I would also install the
lm_sensors package but it already was:
~# pacman -Ql thinkfan
I check that the configuration file for the
thinkpad_acpi module has been created:
~# cat /usr/lib/modprobe.d/thinkpad_acpi.conf
options thinkpad_acpi fan_control=1
~# echo "options thinkpad_acpi fan_control=1" > /usr/lib/modprobe.d/thinkpad_acpi.conf
In both cases, restart the computer.
After the restart I load the
~# modprobe thinkpad_acpi
And I check the fan status:
~# cat /proc/acpi/ibm/fan
status: enabled speed: 0 level: auto
The fan is available but off (goes at 0 revolutions per minute)… And the processor at 80°C and rising.
To set the temperature thresholds I have to create the file
/etc/thinkfan.conf (there are examples in
/usr/share/doc/thinkfan/examples/). Before creating this file, I must know where the temperature sensors are:
~# find /sys/devices -type f -name "temp*_input"
It returns this:
/sys/devices/platform/thinkpad_hwmon/hwmon/hwmon1/temp6_input /sys/devices/platform/thinkpad_hwmon/hwmon/hwmon1/temp3_input /sys/devices/platform/thinkpad_hwmon/hwmon/hwmon1/temp7_input /sys/devices/platform/thinkpad_hwmon/hwmon/hwmon1/temp4_input /sys/devices/platform/thinkpad_hwmon/hwmon/hwmon1/temp8_input /sys/devices/platform/thinkpad_hwmon/hwmon/hwmon1/temp1_input /sys/devices/platform/thinkpad_hwmon/hwmon/hwmon1/temp5_input /sys/devices/platform/thinkpad_hwmon/hwmon/hwmon1/temp2_input /sys/devices/platform/coretemp.0/hwmon/hwmon2/temp3_input /sys/devices/platform/coretemp.0/hwmon/hwmon2/temp1_input /sys/devices/platform/coretemp.0/hwmon/hwmon2/temp2_input /sys/devices/virtual/thermal/thermal_zone0/hwmon0/temp1_input
Now, with this data I create the configuration file
~# nano /etc/thinkfan.conf
With the following content:
tp_fan /proc/acpi/ibm/fan hwmon /sys/devices/platform/thinkpad_hwmon/hwmon/hwmon1/temp6_input hwmon /sys/devices/platform/thinkpad_hwmon/hwmon/hwmon1/temp3_input hwmon /sys/devices/platform/thinkpad_hwmon/hwmon/hwmon1/temp7_input hwmon /sys/devices/platform/thinkpad_hwmon/hwmon/hwmon1/temp4_input hwmon /sys/devices/platform/thinkpad_hwmon/hwmon/hwmon1/temp8_input #hwmon /sys/devices/platform/thinkpad_hwmon/hwmon/hwmon1/temp1_input hwmon /sys/devices/platform/thinkpad_hwmon/hwmon/hwmon1/temp5_input hwmon /sys/devices/platform/thinkpad_hwmon/hwmon/hwmon1/temp2_input hwmon /sys/devices/platform/coretemp.0/hwmon/hwmon2/temp3_input hwmon /sys/devices/platform/coretemp.0/hwmon/hwmon2/temp1_input hwmon /sys/devices/platform/coretemp.0/hwmon/hwmon2/temp2_input hwmon /sys/devices/virtual/thermal/thermal_zone0/hwmon0/temp1_input # Syntax: # (LEVEL, LOW, HIGH) # LEVEL is the fan level to use (0-7 with thinkpad_acpi) # LOW is the temperature at which to step down to the previous level # HIGH is the temperature at which to step up to the next level (0, 0, 55) (1, 48, 60) (2, 50, 61) (3, 52, 63) (4, 56, 65) (5, 59, 66) (7, 63, 32767)
I test the configuration:
~# thinkfan -n
If any sensor fails (cannot find it), comment its line in the file
/etc/thinkfan.conf. When everything is correct, the previous command will return something similar to:
Temperatures(bias): 0(0), 52(0), 52(0), 49(0), 50(0) -> level 0 Temperatures(bias): 0(0), 50(0), 52(0), 51(4), 50(0) -> level 1 Temperatures(bias): 0(0), 46(0), 46(0), 44(0), 47(0) -> level 0 Temperatures(bias): 0(0), 57(15), 61(19), 61(22), 50(2) -> level 7 Temperatures(bias): 0(0), 48(0), 50(0), 50(0), 51(0) -> level 2 Temperatures(bias): 0(0), 45(0), 46(0), 45(0), 47(0) -> level 0
And you will hear how the fan starts from level 1!
It only remains to activate the thinkfan service:
~# systemctl enable thinkfan
Sources: Arch Wiki , Thinkwiki and Amirul Abu at Medium .