Arch стоит на ноутбуке lenovo thinkpad t420s. echo 255 >> /sys/class/hwmon/hwmon1/device/pwm1 ничего не даёт. pwmconfig выдаёт : # pwmconfig # pwmconfig revision $Revision$ ($Date$) This program will search your sensors for pulse width modulation (pwm) controls, and test each one to see if it controls a fan on your motherboard. Note that many motherboards do not have pwm circuitry installed, even if your sensor chip supports pwm.
We will attempt to briefly stop each fan using the pwm controls. The program will attempt to restore each fan to full speed after testing. However, it is ** very important ** that you physically verify that the fans have been to full speed after the program has completed.
Found the following devices: hwmon0 is acpitz hwmon1/device is thinkpad hwmon2 is coretemp
Found the following PWM controls: hwmon1/device/pwm1 current value: 255 hwmon1/device/pwm1 is currently setup for automatic speed control. In general, automatic mode is preferred over manual mode, as it is more efficient and it reacts faster. Are you sure that you want to setup this output for manual control? (n) There are no usable PWM outputs.