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Fri, 16 Oct 2026 10:26:20 -0700 (PDT) Date: Fri, 16 Oct 2026 22:56:14 +0530 From: Krishna Chomal To: Lorenzo Collevecchio Cc: platform-driver-x86@vger.kernel.org, linux-acpi@vger.kernel.org, linux-hwmon@vger.kernel.org, W_Armin@gmx.de Subject: Re: hp-wmi: WHCM AE_AML_OPERAND_TYPE and fan init -22 on HP OmniBook 5 16-ag1xxx (board 8DF4) Message-ID: References: Precedence: bulk X-Mailing-List: linux-hwmon@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Disposition: inline In-Reply-To: On Fri, Oct 16, 2026 at 09:06:03AM +0200, Lorenzo Collevecchio wrote: >Subject: Re: hp-wmi: WHCM AE_AML_OPERAND_TYPE and fan init -22 on HP >OmniBook 5 16-ag1xxx (board 8DF4) > >Hi Krishna, > >Thanks a lot for digging into the ACPI code, the explanation makes >everything fit: the missing GMCF call for HPWMI_GM, Local2 being left >as an Integer, and the -22 coming from that. > >I also tried your suggestion about the platform profile. With >HPWMI_READ/WRITE the errors should not appear: > > Before: dmesg | grep -c WHCM -> 3 (the three boot-time errors) > cat /sys/firmware/acpi/platform_profile -> quiet > After: dmesg | grep -c WHCM -> 3 (no new errors) > >On the fan: thanks for confirming that acpi_fan reads the EC value >correctly. Together with hearing the fan on Mint and on CachyOS at >idle, that makes me fairly comfortable that the 0 RPM readings are the >fan really being off. > >Your plan to query the fan count and hide pwm1_enable and >fan{1,2}_input when it fails sounds good to me. I am happy to test it >on 8DF4 whenever you have a patch, and I can rebase it onto a stable >kernel tree on my side if that is easier for you. > >I also tried 7.2.10-1-cachyos: dmesg and the hp-wmi hwmon folder are >identical to 7.2.9 (three WHCM errors, then the -22 message, and >pwm1_enable still present). > >Thanks again for the time you spent on this. Thanks, I will share the final proposed patch on your Bugzilla report (222138), and leave this thread for others to pick up the WQBC/WQBE errors. >Best regards, >Lorenzo > [...]