[Bug 221569] Laptop fan too loud (spinning nearly always) hp-wmi 7.1-rc4 kerenel

[bugzilla-daemon@kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=221569

--- Comment #34 from Marco Scardovi (scardracs@disroot.org) ---
The output shows that you have a single ACPI thermal zone (acpitz) running at
38°C (38000).

The reason the fan is still spinning at 2100 RPM is that the BIOS has
configured a very low active cooling thresholds (trip points). For example, the
threshold to turn on the fan at its lowest speed might be set to 30°C or 35°C.
Since 38°C is above that threshold, the fan stays on.

To confirm this, you can check your ACPI trip point temperatures by running:

> cat /sys/class/thermal/thermal_zone0/trip_point_*_temp
> cat /sys/class/thermal/thermal_zone0/trip_point_*_type

Since you now have 'power-saver', 'balanced', and 'performance' profiles
working, try switching to the power saver profile:

> powerprofilesctl set power-saver

Under the power-saver profile, the BIOS/EC should increase the temperature
thresholds (e.g. from 35°C to 45°C or 50°C), which should allow the fan to turn
off completely when the system is idling at 38°C.

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