TheWorldOfCode

I have just turned my machines on today and now does the PWM signal on node 3 work, but it is still behaving weird. It is running around 3000 RPM with a pwm1 value of 3, where node 1 need a pwm1 value around 70. The pwm1 was working for 2 hours after that full speed I am currently focusing on fix node 3 (Healthy) which are running the same kernel as node 1 (Healthy) . I checked the dtb files using a sha256sum and that matched on both machines. I did also validate the kernel checksum which also match.

Hi Tparys Sorry for the last reply, it has been a couple of busy days. > If they are exactly the same software, it sounds like a hardware issue. Yes that was my initial thought, and therefore I validated with the HardKernel images on one of broken nodes and since the PWM fan was a normal. It seems to be a software problem instead. > If the HardKernel images works as expected, perhaps you've updated all 3, but not rebooted the working one yet? After the second node broke have a turn all devices off each night and the healthy node has worked every day. > Can you post logs of both working and not working boards? Node 1 (Healthy): https://paste.armbian.com/ibofokalis Node 2 (Unhealthy): https://paste.armbian.com/ifihodukoj I am reinstalled armbian 26.2.1 Noble and here is the PWM not working. I am capable of setting a PWM but it doesn't respond to it. It was on this node I have tested the HardKernel Image Node 3 (Unhealthy): https://paste.armbian.com/kemesojuva I have done some additional debug on this node. The hwmon2/pwm1_enable is set to 1 for manual mode and pwm1 is zero even if the fan is speeding at full speed. If I disable the fancontrol service and manually control the pwm1, it is possible to set the pwm to a different speed and the fan will respond but after a split sensor would the value of pwm1 be reset to 0 instead of the assigned value.

I have three identical Odroid HC 4 which has been running the same software and using the kernel 6.12.32-current-meson64. Their are configured as NAS where the data is split across all three devices and therefore their are running constantly. A couple of weeks ago began the fan on one of the machines behavior different. It would either be running a full speed or no running, it was no longer possible to control via PWM. Now last week did another one start with the same behavior. I was do the following to test and validate the issue: I have disable the fancontrol service and manually written to hwmon2/pwm1 to set the PWM. Which was possible on the healthy HC4, but on the unhealthy HC4 would it only be full speed or no speed. I have tried the latest version of Armbian Noble and Trixie the hwmon2/pwm1 is exposed but doesn't allow me to modify the speed of the fan. I have tried the official os image from Hardkernel and here does the fan work as expected.