Re: [PATCH v2 2/6] platform/x86: lenovo-wmi-other: Limit adding attributes to supported devices

[Mark Pearson]

On Sun, Feb 15, 2026, at 1:12 AM, Derek J. Clark wrote:
> Adds lwmi_is_attr_01_supported, and only creates the attribute subfolder
> if the attribute is supported by the hardware. Due to some poorly
> implemented BIOS, this is a multi-step sequence of events. This is
> because:
> - Some BIOS support getting the capability data from custom mode (0xff),
>   while others only support it in no-mode (0x00).
> - Similarly, some BIOS support get/set for the current value from custom
>   mode (0xff), while others only support it in no-mode (0x00).
> - Some BIOS report capability data for a method that is not fully
>   implemented.
> - Some BIOS have methods fully implemented, but no complimentary
>   capability data.
>
> To ensure we only expose fully implemented methods with corresponding
> capability data, we check each outcome before reporting that an
> attribute can be supported.
>

The Legion's aren't in the Linux program (with an asterisk for the Legion Go/Go2) - but if there's anywhere it's tracked or highlighted which platforms differ/have issues let me know. Not sure how widespread the issues is?

I can try and let the Legion team know that there are platforms which (likely) aren't following the internal specs. It might be possible to improve things for future platforms?

Mark