[alsa-devel] [PATCH] Revert "ALSA: hda - Add mute-LED mode control to Thinkpad"

[Raymond Yau]

>
> This reverts commit 7290006d8c0900c56d8c58428134f02c35109d17.
>
> Through the regression report, it was revealed that the
> tpacpi_led_set() call to thinkpad_acpi helper doesn't only toggle the
> mute LED but actually mutes the sound.  This is contradiction to the
> expectation, and rather confuses user.
>
> According to Henrique, it's not trivial to judge which TP model
> behaves "LED-only" and which model does whatever more intrusive, as
> Lenovo's implementations vary model by model.  So, from the safety
> reason, we should revert the patch for now

Are there any ThinkPad which known to support mute led through ACPI SSMS ?