Troubleshooting • raspberry pi5 fan noise

Hello,

Help me, Recently I heard rpi5 fan noise. The fan is running at full speed. I can not control this. Previously I have never heard it. After some updates, esp, os 13, I heard that.

Following some advices, the problem still is.

The message below, is it normal?

1.
neo0001@mx:~
$ sudo cat /sys/kernel/debug/pwm
0: platform/1f0009c000.pwm, 4 PWM devices
pwm-0 ((null) ): period: 0 ns duty: 0 ns polarity: normal
pwm-1 ((null) ): period: 0 ns duty: 0 ns polarity: normal
pwm-2 ((null) ): period: 0 ns duty: 0 ns polarity: normal
pwm-3 (cooling_fan ): requested period: 41566 ns duty: 0 ns polarity: inverse usage_power
neo0001@mx:~

2. grep -s . /sys/class/thermal/thermal_zone*/* /sys/class/thermal/cooling_device*/*
.
.
.
/sys/class/thermal/cooling_device0/cur_state:0
.
echo 1 > /sys/class/thermal/cooling_device0/cur_state

/sys/class/thermal/cooling_device0/cur_state:0

doesn't change cur_state:0


Thanks for reading

Statistics: Posted by neo0001 — Mon Nov 17, 2025 2:41 am — Replies 0 — Views 26

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