[regression] Laptop fan too loud (spinning nearly always) hp-wmi 7.1-rc4 kernel

[Thorsten Leemhuis]

Hi James! I noticed a regression report that might or might not be
related to hp-wmi; to quote
https://bugzilla.kernel.org/show_bug.cgi?id=221569 :

"""
> Hello, I'm testing 7.1 kernel tree end seeing much louder fan on my laptop even when system is idling. CPU fan is spinning nearly all the time even CPU reported temperatures are low. Currently:
> 
> migo@migo-HP:~$ uname -a
> Linux migo-HP 7.1.0-rc4-00685-g4cbfe4502e3d #45 SMP PREEMPT_DYNAMIC Sun May 24 12:47:18 CEST 2026 x86_64 GNU/Linux
> 
> 
> In 7.0 kernel tree is my laptop much quieter, fan spins only sometimes and with lower RPM.
> 
> Machine is: HP OmniBook X Flip Laptop 16-ar0xx, with Arch Linux installed.
> 
> Is there any way I can make more exact/useful report or debug this issue?
"""

See the ticket for details and kernel logs, I asked a few questions to
hopefully make things a bit easier for you.

Maybe you might have an idea what's wrong here; if not, I guess Milan,
the reporter (CCed), must bisect this to find the change that causes the
problem.

Ciao, Thorsten