Re: acer-wmi: Nitro button doesn't produce a WMI event

[Armin Wolf <W_Armin@gmx.de>]

Am 17.12.24 um 09:33 schrieb Hridesh MG:

> On Tue, Dec 17, 2024 at 6:17 AM Armin Wolf <W_Armin@gmx.de> wrote:
>> Theoretically you can use a i8042 filter to filter out those special
>> keyboard events. However i suspect that Acer will not omit such an WMI
>> event without a good reason. Can you share the output of "acpidump"?
>> Thanks, Armin Wolf
> I've attached the dump. Not sure if it means anything but when i ran
> the command i also got this error:
> Table signature (0x4F324824) is invalid
> Could not get ACPI table at index 29, AE_BAD_HEADER

This seems to be caused by an oddly named ACPI table ("$H20"). I will ask the
ACPICA guys if this check can be relaxed. Other than that this error is harmless.

It also seems that the ACPI code contains the necessary logic to submit an turbo mode
WMI event. I suspect that some settings have to be enabled first.

> I also noticed some difference in the turbo behaviour on linux and
> windows. On windows, making the WMI call increases my fan speed and
> raises my CPU's throttling temperature to 100 C. The same increase in
> fan speeds is observed in linux but the CPU's throttling temperature
> is not affected. I don't have any thermal management daemons running
> and the CPU scaling driver is intel_pstate, do you have any idea what
> could be causing this difference?

The thermal control should be handled by thermald.

Thanks,
Armin Wolf

> Thanks for looking into this!
>
> Best regards,
> Hridesh MG